diff --git a/tools/functions.make b/tools/functions.make
index ba444267c4..00d37c2373 100644
--- a/tools/functions.make
+++ b/tools/functions.make
@@ -26,7 +26,7 @@ preprocess2file = $(shell $(CC) $(PPCFLAGS) $(3) -E -P -x c -include config.h $(
 		grep -v '^\#' | grep -v "^$$" > $(2))
 
 asmdefs2file = $(shell $(CC) $(PPCFLAGS) $(3) -S -x c -o - -include config.h $(1) | \
-	perl -ne 'if(/^AD_(\w+):$$/){$$var=$$1}else{/^\W\.word\W(.*)$$/ && $$var && print "\#define $$var $$1\n";$$var=0}' > $2)
+	perl -ne 'if(/^_?AD_(\w+):$$/){$$var=$$1}elsif($$var){/^\W\.(?:word|long)\W(.*)$$/ && print "\#define $$var $$1\n";$$var=0}' > $2)
 
 c2obj = $(addsuffix .o,$(basename $(subst $(ROOTDIR),$(BUILDDIR),$(1))))