diff --git a/nse_openssl.h b/nse_openssl.h
index 09956622d..84e13584d 100644
--- a/nse_openssl.h
+++ b/nse_openssl.h
@@ -5,7 +5,9 @@
 
 LUALIB_API int luaopen_openssl(lua_State *L);
 
+#if HAVE_OPENSSL
 #include <openssl/bn.h>
 int nse_pushbn( lua_State *L, BIGNUM *num, bool should_free);
 #endif
+#endif