diff --git a/src/esp32.cpp b/src/esp32.cpp
index cf07c75..be4a758 100644
--- a/src/esp32.cpp
+++ b/src/esp32.cpp
@@ -479,7 +479,7 @@ static int ESP32Open(
     p->fp = fopen(zName, mode);
   }
 
-  if( p->fp<=0){
+  if( p->fp == NULL){
     if (aBuf)
       sqlite3_free(aBuf);
     //Serial.println("Can't open");