diff --git a/cli/main.c b/cli/main.c
index c2ec810..a5cccf0 100644
--- a/cli/main.c
+++ b/cli/main.c
@@ -773,7 +773,7 @@ deduce_personality(char *argv[])
 	if (i == NULL)
 		return pkgconf_cross_personality_default();
 
-	prefix = strndup(argv0, i - argv0);
+	prefix = pkgconf_strndup(argv0, i - argv0);
 	out = pkgconf_cross_personality_find(prefix);
 	free(prefix);
 	if (out == NULL)