diff --git a/driver/camera.c b/driver/camera.c
index c6b09ad..f56b5ce 100755
--- a/driver/camera.c
+++ b/driver/camera.c
@@ -1256,8 +1256,13 @@ esp_err_t camera_init(const camera_config_t* config)
     vsync_intr_disable();
     err = gpio_install_isr_service(ESP_INTR_FLAG_LEVEL1 | ESP_INTR_FLAG_IRAM);
     if (err != ESP_OK) {
-        ESP_LOGE(TAG, "gpio_install_isr_service failed (%x)", err);
-        goto fail;
+    	if (err != ESP_ERR_INVALID_STATE) {
+    		ESP_LOGE(TAG, "gpio_install_isr_service failed (%x)", err);
+        	goto fail;
+    	}
+    	else {
+    		ESP_LOGW(TAG, "gpio_install_isr_service already installed");
+    	}
     }
     err = gpio_isr_handler_add(s_state->config.pin_vsync, &vsync_isr, NULL);
     if (err != ESP_OK) {