diff --git a/internal/catch_debugger.hpp b/internal/catch_debugger.hpp
index dc3aec24..5623e48e 100644
--- a/internal/catch_debugger.hpp
+++ b/internal/catch_debugger.hpp
@@ -76,6 +76,8 @@
         #else
             #define BreakIntoDebugger() if( Catch::AmIBeingDebugged() ) {__asm__("int $3\n" : : );}
         #endif
+    #else
+        #define BreakIntoDebugger()
     #endif
 
 #elif defined(__WIN32__) && defined(_MSC_VER)