--- libgig/trunk/src/gig.cpp	2021/06/19 11:01:40	3961
+++ libgig/trunk/src/gig.cpp	2021/06/19 11:05:00	3962
@@ -5876,7 +5876,7 @@
      * @param slot - script slot index of the variable to be unset
      * @param variable - name of the 'patch' variable in that script
      */
-    void Instrument::UnsetScriptPatchVariable(int slot, String variable) {
+    void Instrument::UnsetScriptPatchVariable(ssize_t slot, String variable) {
         Script* script = GetScriptOfSlot(slot);
 
         // option 1: unset a particular variable of one particular script slot