diff --git a/subprocess.cc b/subprocess.cc
index fb34267..aab71b5 100644
--- a/subprocess.cc
+++ b/subprocess.cc
@@ -148,6 +148,7 @@
   record->callback = callback;
   record->callback_data = p;
   gint stdout_fd = -1;
+  GError* error = nullptr;
   bool success = g_spawn_async_with_pipes(
       NULL,  // working directory
       argv.get(),
@@ -159,10 +160,10 @@
       NULL,
       &stdout_fd,
       NULL,
-      NULL);
+      &error);
   FreeArgv(argv.get());
   if (!success) {
-    LOG(ERROR) << "g_spawn_async failed";
+    LOG(ERROR) << "g_spawn_async failed: " << utils::GetAndFreeGError(&error);
     return 0;
   }
   record->tag =