diff --git a/DirectXTex/DirectXTexP.h b/DirectXTex/DirectXTexP.h
index e9532e6..47abf78 100644
--- a/DirectXTex/DirectXTexP.h
+++ b/DirectXTex/DirectXTexP.h
@@ -20,7 +20,7 @@
 // C4640 construction of local static object is not thread-safe
 
 // Off by default warnings
-#pragma warning(disable : 4061 4265 4365 4571 4623 4625 4626 4628 4668 4710 4711 4746 4774 4820 4987 5026 5027 5031 5032 5039)
+#pragma warning(disable : 4061 4265 4365 4571 4623 4625 4626 4628 4668 4710 4711 4746 4774 4820 4987 5026 5027 5031 5032 5039 5045)
 // C4061 enumerator 'X' in switch of enum 'X' is not explicitly handled by a case label
 // C4265 class has virtual functions, but destructor is not virtual
 // C4365 signed/unsigned mismatch
@@ -40,6 +40,7 @@
 // C5027 move assignment operator was implicitly defined as deleted
 // C5031/5032 push/pop mismatches in windows headers
 // C5039 pointer or reference to potentially throwing function passed to extern C function under - EHc
+// C5045 Spectre mitigation warning
 
 // Windows 8.1 SDK related Off by default warnings
 #pragma warning(disable : 4471 4917 4986 5029)