diff --git a/source/libs/function/src/builtins.c b/source/libs/function/src/builtins.c
index 10ea25af6e..a2ff43c8ce 100644
--- a/source/libs/function/src/builtins.c
+++ b/source/libs/function/src/builtins.c
@@ -720,7 +720,7 @@ static int32_t translateDiff(SFunctionNode* pFunc, char* pErrBuf, int32_t len) {
   }
 
   uint8_t resType;
-  if (IS_SIGNED_NUMERIC_TYPE(colType)) {
+  if (IS_SIGNED_NUMERIC_TYPE(colType) || TSDB_DATA_TYPE_BOOL == colType) {
     resType = TSDB_DATA_TYPE_BIGINT;
   } else {
     resType = TSDB_DATA_TYPE_DOUBLE;