diff --git a/wolfssl.vcproj b/wolfssl.vcproj
index f81f47fbd..50781160f 100755
--- a/wolfssl.vcproj
+++ b/wolfssl.vcproj
@@ -42,7 +42,7 @@
 				Name="VCCLCompilerTool"
 				Optimization="0"
 				AdditionalIncludeDirectories="./"
-				PreprocessorDefinitions="OPENSSL_EXTRA;WOLFSSL_RIPEMD;WOLFSSL_SHA512;NO_PSK"
+				PreprocessorDefinitions="OPENSSL_EXTRA;WOLFSSL_RIPEMD;WOLFSSL_SHA512;NO_PSK;WOLFSSL_SNIFFER"
 				MinimalRebuild="true"
 				BasicRuntimeChecks="3"
 				RuntimeLibrary="3"
@@ -107,7 +107,7 @@
 				Optimization="2"
 				EnableIntrinsicFunctions="true"
 				AdditionalIncludeDirectories="./"
-				PreprocessorDefinitions="OPENSSL_EXTRA;WOLFSSL_RIPEMD;WOLFSSL_SHA512;NO_PSK"
+				PreprocessorDefinitions="OPENSSL_EXTRA;WOLFSSL_RIPEMD;WOLFSSL_SHA512;NO_PSK;WOLFSSL_SNIFFER"
 				RuntimeLibrary="2"
 				EnableFunctionLevelLinking="true"
 				UsePrecompiledHeader="0"