diff --git a/asm/src/main/java/dev/openrs2/asm/transform/Transformer.kt b/asm/src/main/java/dev/openrs2/asm/transform/Transformer.kt
index 7c81379a..68466113 100644
--- a/asm/src/main/java/dev/openrs2/asm/transform/Transformer.kt
+++ b/asm/src/main/java/dev/openrs2/asm/transform/Transformer.kt
@@ -13,9 +13,8 @@ abstract class Transformer {
 
         var changed: Boolean
         do {
-            changed = false
+            changed = prePass(classPath)
 
-            prePass(classPath)
             for (library in classPath.libraries) {
                 for (clazz in library) {
                     changed = changed or transformClass(classPath, library, clazz)
@@ -35,7 +34,8 @@ abstract class Transformer {
                     }
                 }
             }
-            postPass(classPath)
+
+            changed = changed or postPass(classPath)
         } while (changed)
 
         postTransform(classPath)
@@ -45,8 +45,8 @@ abstract class Transformer {
         // empty
     }
 
-    protected open fun prePass(classPath: ClassPath) {
-        // empty
+    protected open fun prePass(classPath: ClassPath): Boolean {
+        return false
     }
 
     protected open fun transformClass(classPath: ClassPath, library: Library, clazz: ClassNode): Boolean {
@@ -89,8 +89,8 @@ abstract class Transformer {
         return false
     }
 
-    protected open fun postPass(classPath: ClassPath) {
-        // empty
+    protected open fun postPass(classPath: ClassPath): Boolean {
+        return false
     }
 
     protected open fun postTransform(classPath: ClassPath) {
diff --git a/deob/src/main/java/dev/openrs2/deob/transform/DummyArgTransformer.kt b/deob/src/main/java/dev/openrs2/deob/transform/DummyArgTransformer.kt
index 695a9c1a..110257a4 100644
--- a/deob/src/main/java/dev/openrs2/deob/transform/DummyArgTransformer.kt
+++ b/deob/src/main/java/dev/openrs2/deob/transform/DummyArgTransformer.kt
@@ -149,9 +149,10 @@ class DummyArgTransformer : Transformer() {
         constantsInlined = 0
     }
 
-    override fun prePass(classPath: ClassPath) {
+    override fun prePass(classPath: ClassPath): Boolean {
         argValues.clear()
         conditionalCalls.clear()
+        return false
     }
 
     override fun transformCode(
@@ -327,7 +328,7 @@ class DummyArgTransformer : Transformer() {
         return changed
     }
 
-    override fun postPass(classPath: ClassPath) {
+    override fun postPass(classPath: ClassPath): Boolean {
         for (method in inheritedMethodSets) {
             val args = (Type.getArgumentsAndReturnSizes(method.first().desc) shr 2) - 1
 
@@ -348,6 +349,8 @@ class DummyArgTransformer : Transformer() {
                 constArgs[method] = parameters
             }
         }
+
+        return false
     }
 
     override fun postTransform(classPath: ClassPath) {