diff --git a/engines/agos/extract_agos.cpp b/engines/agos/extract_agos.cpp
index 940022d0..ddc0f260 100644
--- a/engines/agos/extract_agos.cpp
+++ b/engines/agos/extract_agos.cpp
@@ -53,14 +53,13 @@ void ExtractAgos::execute() {
 	if (out) {
 		if (simon_decr(x, out, _filelen)) {
 			savefile(_outputPath.getFullPath(), out, decrlen);
+			free(x);
+			free(out);
 		} else {
 			free(x);
 			free(out);
 			error("%s: decrunch error\n", infilename.getFullPath().c_str());
 		}
-
-		free(x);
-		free(out);
 	}
 }
 
diff --git a/engines/tinsel/compress_tinsel.cpp b/engines/tinsel/compress_tinsel.cpp
index fe5b1324..f88f25a6 100644
--- a/engines/tinsel/compress_tinsel.cpp
+++ b/engines/tinsel/compress_tinsel.cpp
@@ -158,6 +158,7 @@ void CompressTinsel::convertTinselADPCMSample (uint32 sampleSize) {
 	outBuffer = (int16 *)malloc(uncompressedSize);
 	if (!outBuffer) {
 		print("malloc failed!\n");
+		free(inBuffer);
 		return;
 	}
 
diff --git a/sci/sciunpack.cpp b/sci/sciunpack.cpp
index c9c50dc3..5b03fa08 100644
--- a/sci/sciunpack.cpp
+++ b/sci/sciunpack.cpp
@@ -437,6 +437,7 @@ void unpack_resource(int stype, int snr, char *outfilename) {
 					guint8 *outdata = makeMIDI0(found->data, &midilength, midimask);
 					if (!outdata) {
 						fprintf(stderr, "MIDI conversion failed. Aborting...\n");
+						close(outf);
 						return;
 					}
 					if (verbose) printf("MIDI conversion from %d bytes of sound resource"
diff --git a/tools.h b/tools.h
index 925459a4..49273dc5 100644
--- a/tools.h
+++ b/tools.h
@@ -33,7 +33,7 @@
 class Tools {
 public:
 	Tools();
-	~Tools();
+	virtual ~Tools();
 
 	typedef std::vector<Tool *> ToolList;