diff --git a/reactos/tools/rbuild/backend/mingw/mingw.cpp b/reactos/tools/rbuild/backend/mingw/mingw.cpp
index 4673d4dcadd..05163dbdeb9 100644
--- a/reactos/tools/rbuild/backend/mingw/mingw.cpp
+++ b/reactos/tools/rbuild/backend/mingw/mingw.cpp
@@ -743,7 +743,7 @@ MingwBackend::DetectCompiler ()
 		const string& TARGET_CCValue = Environment::GetVariable ( "TARGET_CC" );
 		const string& ROS_PREFIXValue = Environment::GetVariable ( "ROS_PREFIX" );
 
-		if ( ROS_PREFIXValue.length () > 0 )
+		if ( TARGET_CCValue.length () > 0 )
 		{
 			compilerPrefix = "";
 			compilerCommand = TARGET_CCValue;