diff --git a/app/widgets/gimphelp-ids.h b/app/widgets/gimphelp-ids.h
index 32f38e31c4..11ff1d67fa 100644
--- a/app/widgets/gimphelp-ids.h
+++ b/app/widgets/gimphelp-ids.h
@@ -301,7 +301,6 @@
 #define GIMP_HELP_TOOL_CONVOLVE                   "gimp-tool-convolve"
 #define GIMP_HELP_TOOL_CROP                       "gimp-tool-crop"
 #define GIMP_HELP_TOOL_CURVES                     "gimp-tool-curves"
-#define GIMP_HELP_TOOL_CURVES                     "gimp-tool-curves"
 #define GIMP_HELP_TOOL_DODGE_BURN                 "gimp-tool-dodge-burn"
 #define GIMP_HELP_TOOL_ELLIPSE_SELECT             "gimp-tool-ellipse-select"
 #define GIMP_HELP_TOOL_ERASER                     "gimp-tool-eraser"