#include "cache.h"
+#include "exec_cmd.h"
 
 static void flush_current_id(int patchlen, unsigned char *id, git_SHA_CTX *c)
 {
        flush_current_id(patchlen, sha1, &ctx);
 }
 
-static const char patch_id_usage[] = "git-patch-id < patch";
+static const char patch_id_usage[] = "git patch-id < patch";
 
 int main(int argc, char **argv)
 {
        if (argc != 1)
                usage(patch_id_usage);
 
+       git_extract_argv0_path(argv[0]);
+
        generate_id_list();
        return 0;
 }