diff --git a/Crypto/src/EVPCipherImpl.cpp b/Crypto/src/EVPCipherImpl.cpp
index 264144f38..76385c53a 100644
--- a/Crypto/src/EVPCipherImpl.cpp
+++ b/Crypto/src/EVPCipherImpl.cpp
@@ -130,7 +130,7 @@ namespace
 						throwError(Poco::format(fmt, std::string("EVP_PKEY_encrypt(NULL)")));
 					if (EVP_PKEY_encrypt(_pCtx, output, &outLen, _pBuf, static_cast<std::size_t>(maxSize)) <= 0)
 						throwError(Poco::format(fmt, std::string("EVP_PKEY_encrypt")));
-					rc += outLen;
+					rc += static_cast<int>(outLen);
 					output += outLen;
 					outputLength -= outLen;
 					_pos = 0;
@@ -241,7 +241,7 @@ namespace
 						throwError(Poco::format(fmt, std::string("EVP_PKEY_decrypt(NULL)")));
 					if (EVP_PKEY_decrypt(_pCtx, output, &outLen, _pBuf, static_cast<std::size_t>(_pos)) <= 0)
 						throwError(Poco::format(fmt, std::string("EVP_PKEY_decrypt")));
-					rc += outLen;
+					rc += static_cast<int>(outLen);
 					output += outLen;
 					outputLength -= outLen;
 					_pos = 0;
diff --git a/Crypto/src/Envelope.cpp b/Crypto/src/Envelope.cpp
index 03410af35..bfce72685 100644
--- a/Crypto/src/Envelope.cpp
+++ b/Crypto/src/Envelope.cpp
@@ -15,7 +15,9 @@
 #include "Poco/Crypto/Envelope.h"
 
 #if OPENSSL_VERSION_NUMBER >= 0x10100000L
-#define EVP_CIPHER_CTX_init(a) 1
+	#if !defined(EVP_CIPHER_CTX_init)
+		#define EVP_CIPHER_CTX_init(a)
+	#endif
 #endif
 
 namespace Poco {
diff --git a/Util/include/Poco/Util/Application.h b/Util/include/Poco/Util/Application.h
index f149f2d75..5d4f518a5 100644
--- a/Util/include/Poco/Util/Application.h
+++ b/Util/include/Poco/Util/Application.h
@@ -520,7 +520,7 @@ inline Poco::Timespan Application::uptime() const
 		}									\
 		return pApp->run();					\
 	}
-#elif defined(POCO_VXWORKS)
+#elif defined(POCO_VXWORKS) && !defined(POCO_VXWORKS_RTP)
 	#define POCO_APP_MAIN(App) \
 	int pocoAppMain(const char* appName, ...) \
 	{ \