diff --git a/source/duke3d/src/gameexec.cpp b/source/duke3d/src/gameexec.cpp
index d2eb8e51d..579a90910 100644
--- a/source/duke3d/src/gameexec.cpp
+++ b/source/duke3d/src/gameexec.cpp
@@ -36,6 +36,8 @@ Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
 # include "lunatic_game.h"
 #endif
 
+#include "debugbreak.h"
+
 #if KRANDDEBUG
 # define GAMEEXEC_INLINE
 # define GAMEEXEC_STATIC
@@ -5841,6 +5843,7 @@ GAMEEXEC_STATIC void VM_Execute(native_t loop)
                 continue;
 
             default:  // you aren't supposed to be here!
+                debug_break();
                 VM_ScriptInfo(insptr, 64);
                 G_GameExit("An error has occurred in the " APPNAME " virtual machine.\n\n"
                            "If you are an end user, please e-mail the file " APPBASENAME ".log\n"