diff --git a/src/xc_integrator/local_work_driver/host/obara_saika/src/config_obara_saika.hpp b/src/xc_integrator/local_work_driver/host/obara_saika/src/config_obara_saika.hpp
index dcb9f741..5959ee74 100644
--- a/src/xc_integrator/local_work_driver/host/obara_saika/src/config_obara_saika.hpp
+++ b/src/xc_integrator/local_work_driver/host/obara_saika/src/config_obara_saika.hpp
@@ -252,9 +252,11 @@ namespace XCPU {
 
 // Scalar SIMD Emulation
 #else
-
+#ifdef __GNUC__
   #warning "Warning: ISA Not Specified: Using Scalar Code"
-
+#else
+  #pragma message "Warning: ISA Not Specified: Using Scalar Code"
+#endif
   #define SIMD_TYPE double
   
   #define SIMD_LENGTH 1