diff --git a/polymer/eduke32/build/src/startosx.editor.m b/polymer/eduke32/build/src/startosx.editor.m
index aace88346..cf57a3a0c 100644
--- a/polymer/eduke32/build/src/startosx.editor.m
+++ b/polymer/eduke32/build/src/startosx.editor.m
@@ -191,8 +191,13 @@ int startwin_run(void)
     [startwin setupRunMode];
 
     switch ([nsapp runModalForWindow:[startwin window]]) {
+#ifdef MAC_OS_X_VERSION_10_9
+        case NSModalResponseStop: retval = 1; break;
+        case NSModalResponseAbort: retval = 0; break;
+#else
         case NSRunStoppedResponse: retval = 1; break;
         case NSRunAbortedResponse: retval = 0; break;
+#endif
         default: retval = -1;
     }
 
diff --git a/polymer/eduke32/source/startosx.game.m b/polymer/eduke32/source/startosx.game.m
index d6d056bd2..aced990ef 100644
--- a/polymer/eduke32/source/startosx.game.m
+++ b/polymer/eduke32/source/startosx.game.m
@@ -422,8 +422,13 @@ int startwin_run(void)
     [startwin setupRunMode];
 
     switch ([nsapp runModalForWindow:[startwin window]]) {
+#ifdef MAC_OS_X_VERSION_10_9
+        case NSModalResponseStop: retval = 1; break;
+        case NSModalResponseAbort: retval = 0; break;
+#else
         case NSRunStoppedResponse: retval = 1; break;
         case NSRunAbortedResponse: retval = 0; break;
+#endif
         default: retval = -1;
     }
 
diff --git a/polymer/eduke32/source/sw/src/StartupWinController.game.m b/polymer/eduke32/source/sw/src/StartupWinController.game.m
index 571199803..20bfbd976 100644
--- a/polymer/eduke32/source/sw/src/StartupWinController.game.m
+++ b/polymer/eduke32/source/sw/src/StartupWinController.game.m
@@ -438,8 +438,13 @@ int startwin_run(void)
 	[startwin setupRunMode];
 	
 	switch ([NSApp runModalForWindow:[startwin window]]) {
+#ifdef MAC_OS_X_VERSION_10_9
+		case NSModalResponseStop: retval = 1; break;
+		case NSModalResponseAbort: retval = 0; break;
+#else
 		case NSRunStoppedResponse: retval = 1; break;
 		case NSRunAbortedResponse: retval = 0; break;
+#endif
 		default: retval = -1;
 	}
 	
diff --git a/polymer/eduke32/source/testgame/src/StartupWinController.game.m b/polymer/eduke32/source/testgame/src/StartupWinController.game.m
index 35c70cc9c..dc6615eaa 100644
--- a/polymer/eduke32/source/testgame/src/StartupWinController.game.m
+++ b/polymer/eduke32/source/testgame/src/StartupWinController.game.m
@@ -279,8 +279,13 @@ int startwin_run(void)
 
     switch ([NSApp runModalForWindow:[startwin window]])
     {
+#ifdef MAC_OS_X_VERSION_10_9
+    case NSModalResponseStop: retval = 1; break;
+    case NSModalResponseAbort: retval = 0; break;
+#else
     case NSRunStoppedResponse: retval = 1; break;
     case NSRunAbortedResponse: retval = 0; break;
+#endif
     default: retval = -1;
     }