diff --git a/Modules/posixmodule.c b/Modules/posixmodule.c
index 5c67be6..45ea988 100644
--- a/Modules/posixmodule.c
+++ b/Modules/posixmodule.c
@@ -7877,7 +7877,7 @@
 
 		pCryptGenRandom = (CRYPTGENRANDOM)GetProcAddress(
 						hAdvAPI32, "CryptGenRandom");
-		if (pCryptAcquireContext == NULL)
+		if (pCryptGenRandom == NULL)
 			return PyErr_Format(PyExc_NotImplementedError,
 					    "CryptGenRandom not found");