diff --git a/CMakeLists.txt b/CMakeLists.txt
index 8d74724..922b4c9 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -23,7 +23,7 @@ add_compile_options(
   -Wall
   -Wextra
   -Wpedantic
-  -Wno-gcc-compat
+  $<$<C_COMPILER_ID:Clang>:-Wno-gcc-compat>
   -Wno-unused-function)
 
 # Console/embedded cross-compilation targets. When any is ON, desktop-specific
diff --git a/src/server/xrpc_server.c b/src/server/xrpc_server.c
index 6107f7c..a237e2e 100644
--- a/src/server/xrpc_server.c
+++ b/src/server/xrpc_server.c
@@ -1004,7 +1004,7 @@ wf_server_mhd_handler(void *cls, struct MHD_Connection *conn, const char *url,
     struct MHD_Response *mhd_resp;
     wf_xrpc_response resp = WF_XRPC_RESPONSE_INIT;
     wf_xrpc_request req = {0};
-    wf_route_kind kind;
+    wf_route_kind kind = WF_ROUTE_QUERY;
     wf_route *route = NULL;
     wf_http_route *http_route = NULL;
     char *nsid = NULL;
diff --git a/src/transport/websocket.c b/src/transport/websocket.c
index aed81c2..af27cce 100644
--- a/src/transport/websocket.c
+++ b/src/transport/websocket.c
@@ -188,8 +188,7 @@ wf_status wf_websocket_receive(wf_websocket *socket,
         size_t received = 0;
         struct curl_ws_frame *meta = NULL;
         CURLcode result =
-            curl_ws_recv(socket->curl, chunk, sizeof(chunk), &received,
-                         (const struct curl_ws_frame **)&meta);
+            curl_ws_recv(socket->curl, chunk, sizeof(chunk), &received, &meta);
         if (result == CURLE_AGAIN) return WF_ERR_WOULD_BLOCK;
         if (result != CURLE_OK || !meta || (meta->flags & CURLWS_CLOSE)) {
             wf_websocket_discard_pending(socket);
diff --git a/src/transport/xrpc.c b/src/transport/xrpc.c
index 3b34306..12cf03a 100644
--- a/src/transport/xrpc.c
+++ b/src/transport/xrpc.c
@@ -349,7 +349,7 @@ const char *wf_xrpc_last_error(const wf_xrpc_client *client) {
      * that treat the return as borrowed, return the live pointer under lock.
      * Callers that need a stable copy should call this before any other
      * request on the same client. */
-    free(copy);
+    free((void *)copy);
     return err;
 }