diff --git a/engines/glk/jacl/language.h b/engines/glk/jacl/language.h
index ee924f5b91d..4a59225b8ac 100644
--- a/engines/glk/jacl/language.h
+++ b/engines/glk/jacl/language.h
@@ -201,7 +201,6 @@ namespace JACL {
 #define MAXIMUM_EXCEEDED "Maximum number of objects exceeded, can't continue."
 #define ERROR_DETECTED "1 error detected."
 #define ERRORS_DETECTED "%d errors detected."
-#define UNKOWN_OBJECT_RUN "In function \"%s\",  reference to unknown object \"%s\"."
 #define UNKNOWN_FUNCTION_RUN "Attempt to execute unknown function \"%s\"."
 #define UNKNOWN_KEYWORD_ERR "In line %d, unknown keyword \"%s\"."
 #define UNKNOWN_ATTRIBUTE_ERR "In line %d, unknown attribute \"%s\"."
@@ -374,7 +373,6 @@ namespace JACL {
 #define MAXIMUM_EXCEEDED "Maximum number of objects exceeded, can't continue."
 #define ERROR_DETECTED "1 error detected."
 #define ERRORS_DETECTED "%d errors detected."
-#define UNKOWN_OBJECT_RUN "In function \"%s\",  reference to unknown object \"%s\"."
 #define UNKNOWN_FUNCTION_RUN "Attempt to execute unknown function \"%s\"."
 #define UNKNOWN_KEYWORD_ERR "In line %d, unknown keyword \"%s\"."
 #define UNKNOWN_ATTRIBUTE_ERR "In line %d, unknown attribute \"%s\"."
@@ -549,7 +547,6 @@ namespace JACL {
 #define MAXIMUM_EXCEEDED "Maximum number of objects exceeded, can't continue."
 #define ERROR_DETECTED "1 error detected."
 #define ERRORS_DETECTED "%d errors detected."
-#define UNKOWN_OBJECT_RUN "In function \"%s\",  reference to unknown object \"%s\"."
 #define UNKNOWN_FUNCTION_RUN "Attempt to execute unknown function \"%s\"."
 #define UNKNOWN_KEYWORD_ERR "In line %d, unknown keyword \"%s\"."
 #define UNKNOWN_ATTRIBUTE_ERR "In line %d, unknown attribute \"%s\"."