diff --git a/driver/level2/trsv_L.c b/driver/level2/trsv_L.c
index c2ea858ca..941d817cd 100644
--- a/driver/level2/trsv_L.c
+++ b/driver/level2/trsv_L.c
@@ -46,7 +46,7 @@ const static FLOAT dm1 = -1.;
 #define GEMV_UNROLL DTB_ENTRIES
 
 int
-#ifndef MSVC
+#ifndef C_MSVC
 __attribute__((visibility("hidden"))) 
 #endif
 	CNAME(BLASLONG m, FLOAT *a, BLASLONG lda, FLOAT *b, BLASLONG incb, void *buffer){