diff --git a/cryptlib.h b/cryptlib.h
index 4f723fc8..0f5c112e 100644
--- a/cryptlib.h
+++ b/cryptlib.h
@@ -500,9 +500,9 @@ const std::string AAD_CHANNEL;
 const NameValuePairs& g_nullNameValuePairs;
 
 #else
-extern const std::string DEFAULT_CHANNEL;
-extern const std::string AAD_CHANNEL;
-extern const NameValuePairs& g_nullNameValuePairs;
+extern CRYPTOPP_DLL const std::string DEFAULT_CHANNEL;
+extern CRYPTOPP_DLL const std::string AAD_CHANNEL;
+extern CRYPTOPP_DLL const NameValuePairs& g_nullNameValuePairs;
 #endif
 
 // Document additional name spaces which show up elsewhere in the sources.
diff --git a/gf2n.cpp b/gf2n.cpp
index c52d0e0e..7058487c 100644
--- a/gf2n.cpp
+++ b/gf2n.cpp
@@ -43,8 +43,8 @@ ANONYMOUS_NAMESPACE_END
 NAMESPACE_BEGIN(CryptoPP)
 
 #if (CRYPTOPP_CLMUL_AVAILABLE)
-extern void GF2NT_233_Multiply_Reduce_CLMUL(const word* pA, const word* pB, word* pC);
-extern void GF2NT_233_Square_Reduce_CLMUL(const word* pA, word* pC);
+extern CRYPTOPP_DLL void GF2NT_233_Multiply_Reduce_CLMUL(const word* pA, const word* pB, word* pC);
+extern CRYPTOPP_DLL void GF2NT_233_Square_Reduce_CLMUL(const word* pA, word* pC);
 #endif
 
 #if (CRYPTOPP_ARM_PMULL_AVAILABLE)