--- a/src/Makefile.am
+++ b/src/Makefile.am
@@ -30,7 +30,7 @@
 libidn2_cmd_la_LIBADD = ../lib/libgnu.la
 libidn2_cmd_la_CFLAGS =
 
-idn2_cmd.c idn2_cmd.h: idn2.ggo Makefile.am
+idn2_cmd.c idn2_cmd.h: idn2.ggo
 	gengetopt --unamed-opts --no-handle-version --no-handle-help \
 		--set-package="idn2" \
 		--input $^ --file-name idn2_cmd