diff --git a/hack/libsubid_tag.sh b/hack/libsubid_tag.sh
index 66544dc02..31412b3e6 100755
--- a/hack/libsubid_tag.sh
+++ b/hack/libsubid_tag.sh
@@ -7,9 +7,15 @@ mkdir -p "$tmpdir"
 trap 'rm -fr "$tmpdir"' EXIT
 cc -o "$tmpdir"/libsubid_tag -l subid -x c - > /dev/null 2> /dev/null << EOF
 #include <shadow/subid.h>
+#include <stdio.h>
+#include <stdlib.h>
+
+const char *Prog = "test";
+FILE *shadow_logfd = NULL;
+
 int main() {
 	struct subid_range *ranges = NULL;
-#if SUBID_ABI_MAJOR >= 4j
+#if SUBID_ABI_MAJOR >= 4
 	subid_get_uid_ranges("root", &ranges);
 #else
 	get_subuid_ranges("root", &ranges);