diff --git a/GNUmakefile b/GNUmakefile
index f2ec31b3..3d5733d9 100644
--- a/GNUmakefile
+++ b/GNUmakefile
@@ -1254,7 +1254,7 @@ help: ## Display this help message.
 	-vC=$$(tput setaf 6) \
 	-vR=$$(tput sgr0) ' \
 	/^## ==.*==$$/ { sub(/^## ?/, ""); printf "%s%s%s\n", C, $$0, R } \
-	/^##.*:\=.*/ { sub(/^## ?/, ""); sub(/:\=/, ":"); printf "  %s%-20s%s %s%s%s\n", M, $$1, R, O, $$2, R } \
+	/^##.*:=.*/ { sub(/^## ?/, ""); sub(/:=/, ":"); printf "  %s%-20s%s %s%s%s\n", M, $$1, R, O, $$2, R } \
 	/^##/ { sub(/^## ?/, ""); print $$0 } \
 	/^[[:alnum:]-]+:.*##/ { \
 		sub(/:.*##\s?/, ":"); \