diff --git a/drivers/storage/storahci/storahci.c b/drivers/storage/storahci/storahci.c
index 54931ac6ff1..c674b2b7af4 100644
--- a/drivers/storage/storahci/storahci.c
+++ b/drivers/storage/storahci/storahci.c
@@ -1480,6 +1480,12 @@ AhciProcessSrb (
  * @param PortExtension
  *
  */
+
+#ifdef _MSC_VER     // avoid MSVC C4700
+    #pragma warning(push)
+    #pragma warning(disable: 4700)
+#endif
+
 VOID
 AhciActivatePort (
     __in PAHCI_PORT_EXTENSION PortExtension
@@ -1529,6 +1535,10 @@ AhciActivatePort (
     return;
 }// -- AhciActivatePort();
 
+#ifdef _MSC_VER     // avoid MSVC C4700
+    #pragma warning(pop)
+#endif
+
 /**
  * @name AhciProcessIO
  * @implemented