diff --git a/src/main/java/com/alibaba/druid/sql/visitor/functions/If.java b/src/main/java/com/alibaba/druid/sql/visitor/functions/If.java
index 243f7ca1b5..a2d1f9bc8c 100644
--- a/src/main/java/com/alibaba/druid/sql/visitor/functions/If.java
+++ b/src/main/java/com/alibaba/druid/sql/visitor/functions/If.java
@@ -38,7 +38,10 @@ public class If implements Function {
         SQLExpr condition = parameters.get(0);
         condition.accept(visitor);
         Object itemValue = condition.getAttributes().get(EVAL_VALUE);
-        if (Boolean.TRUE == itemValue || (itemValue != null && !SQLEvalVisitorUtils.eq(itemValue, 0))) {
+        if (itemValue == null) {
+            return null;
+        }
+        if (Boolean.TRUE == itemValue || !SQLEvalVisitorUtils.eq(itemValue, 0)) {
             SQLExpr trueExpr = parameters.get(1);
             trueExpr.accept(visitor);
             return trueExpr.getAttributes().get(EVAL_VALUE);