diff --git a/FDTD/operator_sse_compressed.cpp b/FDTD/operator_sse_compressed.cpp
index 88fed2d..40d2750 100644
--- a/FDTD/operator_sse_compressed.cpp
+++ b/FDTD/operator_sse_compressed.cpp
@@ -108,7 +108,7 @@ void Operator_SSE_Compressed::ShowStat() const
 INLINE int equal(f4vector v1, f4vector v2)
 {
 #if defined(__SSE__)
-	#if (__GNUC__ == 4) && (__GNUC_PATCHLEVEL__ < 4)
+	#if (__GNUC__ == 4) && (__GNUC_MINOR__ < 4)
 		v4si compare = __builtin_ia32_cmpeqps( v1.v, v2.v );
 		return __builtin_ia32_movmskps( (v4sf)compare ) == 0x0f;
 	#else