diff --git a/lib/cf-h2-proxy.c b/lib/cf-h2-proxy.c
index 99c39f6f98..68194dc786 100644
--- a/lib/cf-h2-proxy.c
+++ b/lib/cf-h2-proxy.c
@@ -1158,10 +1158,9 @@ static CURLcode h2_handle_tunnel_close(struct Curl_cfilter *cf,
 
   *pnread = 0;
   if(ctx->tunnel.error) {
-    failf(data, "HTTP/2 stream %" PRIu32 " reset by %s (error 0x%" PRIx32
-          " %s)", ctx->tunnel.stream_id,
-           ctx->tunnel.reset ? "server" : "curl",
-           ctx->tunnel.error, nghttp2_http2_strerror(ctx->tunnel.error));
+    failf(data, "HTTP/2 stream %u reset by %s (error 0x%x %s)",
+          ctx->tunnel.stream_id, ctx->tunnel.reset ? "server" : "curl",
+          ctx->tunnel.error, nghttp2_http2_strerror(ctx->tunnel.error));
     return CURLE_RECV_ERROR;
   }
 
diff --git a/lib/http2.c b/lib/http2.c
index c3f2c1be34..d5f3132252 100644
--- a/lib/http2.c
+++ b/lib/http2.c
@@ -1709,9 +1709,9 @@ static CURLcode http2_handle_stream_close(struct Curl_cfilter *cf,
         stream->close_handled = TRUE;
         return CURLE_OK;
     }
-    failf(data, "HTTP/2 stream %" PRIu32 " reset by %s (error 0x%" PRIx32
-          " %s)", stream->id, stream->reset_by_server ? "server" : "curl",
-           stream->error, nghttp2_http2_strerror(stream->error));
+    failf(data, "HTTP/2 stream %u reset by %s (error 0x%x %s)",
+          stream->id, stream->reset_by_server ? "server" : "curl",
+          stream->error, nghttp2_http2_strerror(stream->error));
     return stream->error ? CURLE_HTTP2_STREAM :
            (data->req.bytecount ? CURLE_PARTIAL_FILE : CURLE_HTTP2);
   }