diff --git a/src/Makefile.am b/src/Makefile.am
index e508ceeb..77c7cd2d 100644
--- a/src/Makefile.am
+++ b/src/Makefile.am
@@ -53,6 +53,7 @@ version.c: hg-id
 	printf '%s\n' '";' >> $@
 
 .INTERMEDIATE: hg-id
+.PHONY: hg-id
 hg-id: $(wget_SOURCES) $(LDADD)
 	-( hg id | cut -f 1 -d ' ' ) 2>/dev/null > $@