diff --git a/src/clipmenu.c b/src/clipmenu.c
index 434f3ca..7ea297e 100644
--- a/src/clipmenu.c
+++ b/src/clipmenu.c
@@ -16,6 +16,8 @@
 static int dmenu_user_argc;
 static char **dmenu_user_argv;
 
+#define HASH_INVALID UINT64_MAX
+
 /**
  * Calculate the base 10 padding length for a number.
  */
@@ -136,6 +138,7 @@ static int _nonnull_ interact_with_dmenu(struct config *cfg, int *input_pipe,
     int forced_ret = 0;
     if (str_to_uint64(sel_idx_str, &sel_idx) < 0 || sel_idx == 0 ||
         sel_idx > cur_clips) {
+        *out_hash = HASH_INVALID;
         forced_ret = EXIT_FAILURE;
     } else {
         *out_hash = idx_to_hash[sel_idx - 1];
@@ -179,7 +182,7 @@ int main(int argc, char *argv[]) {
     uint64_t hash;
     int dmenu_exit_code = prompt_user_for_hash(&cfg, &hash);
 
-    if (dmenu_exit_code == EXIT_SUCCESS) {
+    if (dmenu_exit_code == EXIT_SUCCESS && hash != HASH_INVALID) {
         run_clipserve(hash);
     }