diff --git a/CHANGELOG.md b/CHANGELOG.md
index db6e22bf6..620322361 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -24,6 +24,7 @@ All notable changes to this project will be documented in this file.
 - AS2 - class detection - ignore standalone directvalues
 - AS1/2 - obfuscated name in forin cannot use eval
 - Ternar visit (can cause invalid reg declarations)
+- AS1/2 - typeof precedence / parenthesis
 
 ## [14.6.0] - 2021-11-22
 ### Added
diff --git a/libsrc/ffdec_lib/src/com/jpexs/decompiler/flash/action/model/TypeOfActionItem.java b/libsrc/ffdec_lib/src/com/jpexs/decompiler/flash/action/model/TypeOfActionItem.java
index 0586e32a9..37700e0eb 100644
--- a/libsrc/ffdec_lib/src/com/jpexs/decompiler/flash/action/model/TypeOfActionItem.java
+++ b/libsrc/ffdec_lib/src/com/jpexs/decompiler/flash/action/model/TypeOfActionItem.java
@@ -38,14 +38,21 @@ import java.util.Set;
 public class TypeOfActionItem extends ActionItem {
 
     public TypeOfActionItem(GraphSourceItem instruction, GraphSourceItem lineStartIns, GraphTargetItem value) {
-        super(instruction, lineStartIns, PRECEDENCE_PRIMARY, value);
+        super(instruction, lineStartIns, PRECEDENCE_UNARY, value);
     }
 
     @Override
     public GraphTextWriter appendTo(GraphTextWriter writer, LocalData localData) throws InterruptedException {
         writer.append("typeof ");
         writer.spaceBeforeCallParenthesies(1);
+        if (value.getPrecedence() > getPrecedence()) {
+            writer.append("(");
+        }
         value.toString(writer, localData);
+        if (value.getPrecedence() > getPrecedence()) {
+            writer.append(")");
+        }
+
         return writer;
     }