diff --git a/polymer/eduke32/source/gamedef.c b/polymer/eduke32/source/gamedef.c
index 0b43220f0..c2bef6bf0 100644
--- a/polymer/eduke32/source/gamedef.c
+++ b/polymer/eduke32/source/gamedef.c
@@ -1109,6 +1109,7 @@ const memberlabel_t UserdefsLabels[]=
     { "show_level_text", USERDEFS_SHOW_LEVEL_TEXT, 0, 0 },
     { "weaponscale", USERDEFS_WEAPONSCALE, 0, 0 },
     { "textscale", USERDEFS_TEXTSCALE, 0, 0 },
+    { "runkey_mode", USERDEFS_RUNKEY_MODE, 0, 0 },
     { "", -1, 0, 0  }     // END OF LIST
 };
 
diff --git a/polymer/eduke32/source/gamedef.h b/polymer/eduke32/source/gamedef.h
index 94d818341..1d9bfff9d 100644
--- a/polymer/eduke32/source/gamedef.h
+++ b/polymer/eduke32/source/gamedef.h
@@ -419,6 +419,7 @@ enum UserdefsLabel_t
     USERDEFS_SHOW_LEVEL_TEXT,
     USERDEFS_WEAPONSCALE,
     USERDEFS_TEXTSCALE,
+    USERDEFS_RUNKEY_MODE,
     USERDEFS_END
 };
 
diff --git a/polymer/eduke32/source/gamestructures.c b/polymer/eduke32/source/gamestructures.c
index 72193bcc3..51a8f6ac1 100644
--- a/polymer/eduke32/source/gamestructures.c
+++ b/polymer/eduke32/source/gamestructures.c
@@ -906,6 +906,15 @@ static void __fastcall VM_AccessUserdef(int32_t iSet, int32_t lLabelID, int32_t
         Gv_SetVarX(lVar2, ud.textscale);
         return;
 
+    case USERDEFS_RUNKEY_MODE:
+        if (iSet)
+        {
+            ud.runkey_mode = lValue;
+            return;
+        }
+        Gv_SetVarX(lVar2, ud.runkey_mode);
+        return;
+
     default:
         return;
     }