diff --git a/osrng.cpp b/osrng.cpp
index 0619b34d..6d36aaea 100644
--- a/osrng.cpp
+++ b/osrng.cpp
@@ -146,7 +146,7 @@ void NonblockingRng::GenerateBlock(byte *output, size_t size)
 {
 #ifdef CRYPTOPP_WIN32_AVAILABLE
 	// Acquiring a provider is expensive. Do it once and retain the reference.
-	static const MicrosoftCryptoProvider &hProvider = Singleton<MicrosoftCryptoProvider>().Ref();
+	const MicrosoftCryptoProvider &hProvider = Singleton<MicrosoftCryptoProvider>().Ref();
 # if defined(USE_MS_CRYPTOAPI)
 	if (!CryptGenRandom(hProvider.GetProviderHandle(), (DWORD)size, output))
 		throw OS_RNG_Err("CryptGenRandom");