diff --git a/src/compiler/core.ts b/src/compiler/core.ts
index 1980cf9ad9e..de6e5357ea7 100644
--- a/src/compiler/core.ts
+++ b/src/compiler/core.ts
@@ -1120,6 +1120,18 @@ namespace ts {
         }
     }
 
+    export function getEnvironmentVariable(name: string, host?: CompilerHost) {
+        if (host && host.getEnvironmentVariable) {
+            return host.getEnvironmentVariable(name);
+        }
+
+        if (sys && sys.getEnvironmentVariable) {
+            return sys.getEnvironmentVariable(name);
+        }
+
+        return "";
+    }
+
     export function copyListRemovingItem<T>(item: T, list: T[]) {
         const copiedList: T[] = [];
         for (const e of list) {
diff --git a/src/compiler/transformer.ts b/src/compiler/transformer.ts
index 9e58b02c208..a448893f345 100644
--- a/src/compiler/transformer.ts
+++ b/src/compiler/transformer.ts
@@ -23,6 +23,100 @@ namespace ts {
         EmitNotifications = 1 << 1,
     }
 
+    /* @internal */
+    export interface TransformationContext extends LexicalEnvironment {
+        getCompilerOptions(): CompilerOptions;
+        getEmitResolver(): EmitResolver;
+        getEmitHost(): EmitHost;
+
+        /**
+         * Gets flags used to customize later transformations or emit.
+         */
+        getNodeEmitFlags(node: Node): NodeEmitFlags;
+
+        /**
+         * Sets flags used to customize later transformations or emit.
+         */
+        setNodeEmitFlags<T extends Node>(node: T, flags: NodeEmitFlags): T;
+
+        /**
+         * Gets the TextRange to use for source maps for the node.
+         */
+        getSourceMapRange(node: Node): TextRange;
+
+        /**
+         * Sets the TextRange to use for source maps for the node.
+         */
+        setSourceMapRange<T extends Node>(node: T, range: TextRange): T;
+
+        /**
+         * Gets the TextRange to use for source maps for a token of a node.
+         */
+        getTokenSourceMapRange(node: Node, token: SyntaxKind): TextRange;
+
+        /**
+         * Sets the TextRange to use for source maps for a token of a node.
+         */
+        setTokenSourceMapRange<T extends Node>(node: T, token: SyntaxKind, range: TextRange): T;
+
+        /**
+         * Gets the TextRange to use for comments for the node.
+         */
+        getCommentRange(node: Node): TextRange;
+
+        /**
+         * Sets the TextRange to use for comments for the node.
+         */
+        setCommentRange<T extends Node>(node: T, range: TextRange): T;
+
+        /**
+         * Hoists a function declaration to the containing scope.
+         */
+        hoistFunctionDeclaration(node: FunctionDeclaration): void;
+
+        /**
+         * Hoists a variable declaration to the containing scope.
+         */
+        hoistVariableDeclaration(node: Identifier): void;
+
+        /**
+         * Enables expression substitutions in the pretty printer for the provided SyntaxKind.
+         */
+        enableSubstitution(kind: SyntaxKind): void;
+
+        /**
+         * Determines whether expression substitutions are enabled for the provided node.
+         */
+        isSubstitutionEnabled(node: Node): boolean;
+
+        /**
+         * Hook used by transformers to substitute expressions just before they
+         * are emitted by the pretty printer.
+         */
+        onSubstituteNode?: (node: Node, isExpression: boolean) => Node;
+
+        /**
+         * Enables before/after emit notifications in the pretty printer for the provided
+         * SyntaxKind.
+         */
+        enableEmitNotification(kind: SyntaxKind): void;
+
+        /**
+         * Determines whether before/after emit notifications should be raised in the pretty
+         * printer when it emits a node.
+         */
+        isEmitNotificationEnabled(node: Node): boolean;
+
+        /**
+         * Hook used to allow transformers to capture state before or after
+         * the printer emits a node.
+         */
+        onEmitNode?: (node: Node, emit: (node: Node) => void) => void;
+    }
+
+    /* @internal */
+    export type Transformer = (context: TransformationContext) => (node: SourceFile) => SourceFile;
+
     export function getTransformers(compilerOptions: CompilerOptions) {
         const jsx = compilerOptions.jsx;
         const languageVersion = getEmitScriptTarget(compilerOptions);
diff --git a/src/compiler/types.ts b/src/compiler/types.ts
index 2b601b9c1ea..d868e024e0f 100644
--- a/src/compiler/types.ts
+++ b/src/compiler/types.ts
@@ -2975,99 +2975,6 @@ namespace ts {
         endLexicalEnvironment(): Statement[];
     }
 
-    /* @internal */
-    export interface TransformationContext extends LexicalEnvironment {
-        getCompilerOptions(): CompilerOptions;
-        getEmitResolver(): EmitResolver;
-        getEmitHost(): EmitHost;
-
-        /**
-         * Gets flags used to customize later transformations or emit.
-         */
-        getNodeEmitFlags(node: Node): NodeEmitFlags;
-
-        /**
-         * Sets flags used to customize later transformations or emit.
-         */
-        setNodeEmitFlags<T extends Node>(node: T, flags: NodeEmitFlags): T;
-
-        /**
-         * Gets the TextRange to use for source maps for the node.
-         */
-        getSourceMapRange(node: Node): TextRange;
-
-        /**
-         * Sets the TextRange to use for source maps for the node.
-         */
-        setSourceMapRange<T extends Node>(node: T, range: TextRange): T;
-
-        /**
-         * Gets the TextRange to use for source maps for a token of a node.
-         */
-        getTokenSourceMapRange(node: Node, token: SyntaxKind): TextRange;
-
-        /**
-         * Sets the TextRange to use for source maps for a token of a node.
-         */
-        setTokenSourceMapRange<T extends Node>(node: T, token: SyntaxKind, range: TextRange): T;
-
-        /**
-         * Gets the TextRange to use for comments for the node.
-         */
-        getCommentRange(node: Node): TextRange;
-
-        /**
-         * Sets the TextRange to use for comments for the node.
-         */
-        setCommentRange<T extends Node>(node: T, range: TextRange): T;
-
-        /**
-         * Hoists a function declaration to the containing scope.
-         */
-        hoistFunctionDeclaration(node: FunctionDeclaration): void;
-
-        /**
-         * Hoists a variable declaration to the containing scope.
-         */
-        hoistVariableDeclaration(node: Identifier): void;
-
-        /**
-         * Enables expression substitutions in the pretty printer for the provided SyntaxKind.
-         */
-        enableSubstitution(kind: SyntaxKind): void;
-
-        /**
-         * Determines whether expression substitutions are enabled for the provided node.
-         */
-        isSubstitutionEnabled(node: Node): boolean;
-
-        /**
-         * Hook used by transformers to substitute expressions just before they
-         * are emitted by the pretty printer.
-         */
-        onSubstituteNode?: (node: Node, isExpression: boolean) => Node;
-
-        /**
-         * Enables before/after emit notifications in the pretty printer for the provided
-         * SyntaxKind.
-         */
-        enableEmitNotification(kind: SyntaxKind): void;
-
-        /**
-         * Determines whether before/after emit notifications should be raised in the pretty
-         * printer when it emits a node.
-         */
-        isEmitNotificationEnabled(node: Node): boolean;
-
-        /**
-         * Hook used to allow transformers to capture state before or after
-         * the printer emits a node.
-         */
-        onEmitNode?: (node: Node, emit: (node: Node) => void) => void;
-    }
-
-    /* @internal */
-    export type Transformer = (context: TransformationContext) => (node: SourceFile) => SourceFile;
 
     export interface TextSpan {
         start: number;
diff --git a/src/compiler/utilities.ts b/src/compiler/utilities.ts
index 655f731f10c..76c70195017 100644
--- a/src/compiler/utilities.ts
+++ b/src/compiler/utilities.ts
@@ -207,18 +207,6 @@ namespace ts {
         return `${ file.fileName }(${ loc.line + 1 },${ loc.character + 1 })`;
     }
 
-    export function getEnvironmentVariable(name: string, host?: CompilerHost) {
-        if (host && host.getEnvironmentVariable) {
-            return host.getEnvironmentVariable(name);
-        }
-
-        if (sys && sys.getEnvironmentVariable) {
-            return sys.getEnvironmentVariable(name);
-        }
-
-        return "";
-    }
-
     export function getStartPosOfNode(node: Node): number {
         return node.pos;
     }