diff --git a/config-msvc.h b/config-msvc.h
index a624f97d..e7479c86 100644
--- a/config-msvc.h
+++ b/config-msvc.h
@@ -113,6 +113,8 @@
 #define HAVE_EC_GROUP_ORDER_BITS 1
 #define HAVE_EVP_CIPHER_CTX_RESET 1
 
+#define HAVE_EXPORT_KEYING_MATERIAL 1
+
 #define HAVE_DIINSTALLDEVICE 1
 
 #define PATH_SEPARATOR     '\\'