Only create openssl_locks if thread support is enabled
diff --git a/src/global.c b/src/global.c
index c72bfe8..f89c732 100644
--- a/src/global.c
+++ b/src/global.c
@@ -19,7 +19,9 @@ git_mutex git__mwindow_mutex;
#ifdef GIT_SSL
# include <openssl/ssl.h>
SSL_CTX *git__ssl_ctx;
+# ifdef GIT_THREADS
static git_mutex *openssl_locks;
+# endif
#endif
static git_global_shutdown_fn git__shutdown_callbacks[MAX_SHUTDOWN_CB];