diff --git a/kernel/x86_64/dsymv_L_microk_skylakex-2.c b/kernel/x86_64/dsymv_L_microk_skylakex-2.c
index bdcd914fb..f0df5aaa8 100644
--- a/kernel/x86_64/dsymv_L_microk_skylakex-2.c
+++ b/kernel/x86_64/dsymv_L_microk_skylakex-2.c
@@ -36,7 +36,9 @@ USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 #if defined(__clang_patchlevel__) && __clang_major__ == 9 && __clang_minor__ == 0 && __clang_patchlevel__ == 0
 #pragma clang optimize off
 #endif
-
+#if defined(__apple_build_version__) && __clang_major__ == 11 && __clang_minor__ == 0 && __clang_patchlevel__ == 3
+#pragma clang optimize off
+#endif
 static void dsymv_kernel_4x4(BLASLONG from, BLASLONG to, FLOAT **a, FLOAT *x, FLOAT *y, FLOAT *temp1, FLOAT *temp2)
 {
 
@@ -164,6 +166,9 @@ static void dsymv_kernel_4x4(BLASLONG from, BLASLONG to, FLOAT **a, FLOAT *x, FL
 #if defined(__clang_patchlevel__) && __clang_major__ == 9 && __clang_minor__ == 0 && __clang_patchlevel__ == 0
 #pragma clang optimize on
 #endif
+#if defined(__apple_build_version__) && __clang_major__ == 11 && __clang_minor__ == 0 && __clang_patchlevel__ == 3
+#pragma clang optimize on
+#endif
 
 #else
 #include "dsymv_L_microk_haswell-2.c"