diff --git a/support/tools/Burg/Makefile b/support/tools/Burg/Makefile
index 1022358b88d..13041b1e072 100644
--- a/support/tools/Burg/Makefile
+++ b/support/tools/Burg/Makefile
@@ -4,7 +4,7 @@ ExtraSource = gram.tab.c
 
 include $(LEVEL)/Makefile.common
 
-gram.tab.c gram.tab.h: gram.yc
+gram.tab.c gram.tab.h:: gram.yc
 	$(VERB) $(BISON) -o gram.tab.c -d $<
 
 lex.c: gram.tab.h
diff --git a/utils/Burg/Makefile b/utils/Burg/Makefile
index 1022358b88d..13041b1e072 100644
--- a/utils/Burg/Makefile
+++ b/utils/Burg/Makefile
@@ -4,7 +4,7 @@ ExtraSource = gram.tab.c
 
 include $(LEVEL)/Makefile.common
 
-gram.tab.c gram.tab.h: gram.yc
+gram.tab.c gram.tab.h:: gram.yc
 	$(VERB) $(BISON) -o gram.tab.c -d $<
 
 lex.c: gram.tab.h