diff --git a/src/plugins/debugger/procinterrupt.cpp b/src/plugins/debugger/procinterrupt.cpp
index e93b3260146..0ad32373af7 100644
--- a/src/plugins/debugger/procinterrupt.cpp
+++ b/src/plugins/debugger/procinterrupt.cpp
@@ -103,6 +103,7 @@ bool Debugger::Internal::interruptProcess(int pID, int engineType, QString *erro
         // GDB: not supported
         const bool useDebugBreakApi= true;
         Q_UNUSED(engineExecutableIs64Bit)
+        Q_UNUSED(engineType)
 
 #else
         // Qt-Creator compiled 32 bit: