diff --git a/mongoose.c b/mongoose.c
index 86326a58..ed977a7f 100644
--- a/mongoose.c
+++ b/mongoose.c
@@ -399,9 +399,9 @@ void mg_error(struct mg_connection *c, const char *fmt, ...) {
   mg_vasprintf(&buf, sizeof(mem), fmt, ap);
   va_end(ap);
   LOG(LL_ERROR, ("%lu %s", c->id, buf));
-  mg_call(c, MG_EV_ERROR, buf);
+  c->is_closing = 1;             // Set is_closing before sending MG_EV_CALL
+  mg_call(c, MG_EV_ERROR, buf);  // Let user handler to override it
   if (buf != mem) free(buf);
-  c->is_closing = 1;
 }
 
 #ifdef MG_ENABLE_LINES
diff --git a/src/event.c b/src/event.c
index f7d0036f..83fd23ea 100644
--- a/src/event.c
+++ b/src/event.c
@@ -18,7 +18,7 @@ void mg_error(struct mg_connection *c, const char *fmt, ...) {
   mg_vasprintf(&buf, sizeof(mem), fmt, ap);
   va_end(ap);
   LOG(LL_ERROR, ("%lu %s", c->id, buf));
-  mg_call(c, MG_EV_ERROR, buf);
+  c->is_closing = 1;             // Set is_closing before sending MG_EV_CALL
+  mg_call(c, MG_EV_ERROR, buf);  // Let user handler to override it
   if (buf != mem) free(buf);
-  c->is_closing = 1;
 }