diff --git a/deob-ast/src/main/java/dev/openrs2/deob/ast/util/ExprUtils.kt b/deob-ast/src/main/java/dev/openrs2/deob/ast/util/ExprUtils.kt
index 169a85d3..d017fe0a 100644
--- a/deob-ast/src/main/java/dev/openrs2/deob/ast/util/ExprUtils.kt
+++ b/deob-ast/src/main/java/dev/openrs2/deob/ast/util/ExprUtils.kt
@@ -116,7 +116,7 @@ fun Expression.countNots(): Int {
 }
 
 fun Expression.hasSideEffects(): Boolean {
-    if (isLiteralExpr || isNameExpr || isFieldAccessExpr) {
+    if (isLiteralExpr || isNameExpr || isFieldAccessExpr || isThisExpr) {
         return false
     } else if (isUnaryExpr) {
         return asUnaryExpr().expression.hasSideEffects()