diff --git a/configure.py b/configure.py
index 0138c52b..3b613099 100755
--- a/configure.py
+++ b/configure.py
@@ -29,6 +29,7 @@ COMPLETE_OBJECTS = [
     "MetroidPrime/ScriptObjects/CScriptDebugCameraWaypoint",
     "Weapons/IWeaponRenderer",
     "Collision/CMaterialList",
+    "Collision/CMaterialFilter",
     "Collision/CMRay",
     "Kyoto/Basics/CStopwatch",
     "Kyoto/Basics/COsContextDolphin",
diff --git a/include/Collision/CMaterialList.hpp b/include/Collision/CMaterialList.hpp
index 8c1fe409..cc647591 100644
--- a/include/Collision/CMaterialList.hpp
+++ b/include/Collision/CMaterialList.hpp
@@ -118,8 +118,8 @@ public:
   // Intersection__13CMaterialListCFRC13CMaterialList weak
   static s32 BitPosition(u64 flags);
   // GetMaterialString__13CMaterialListCFv weak
-  u64 SharesMaterials(const CMaterialList& other) const {
-    return (other.value & value);
+  bool SharesMaterials(const CMaterialList& other) const {
+    return (other.value & value) ? true : false;
   }
 
 private:
diff --git a/obj_files.mk b/obj_files.mk
index fd9bedb6..9be9e7f4 100644
--- a/obj_files.mk
+++ b/obj_files.mk
@@ -410,10 +410,10 @@ COLLISION :=\
 	$(BUILD_DIR)/asm/Collision/CCollisionInfo.o\
 	$(BUILD_DIR)/asm/Collision/InternalColliders.o\
 	$(BUILD_DIR)/asm/Collision/CCollisionPrimitive.o\
-	$(BUILD_DIR)/asm/Collision/CMaterialList.o\
+	$(BUILD_DIR)/src/Collision/CMaterialList.o\
 	$(BUILD_DIR)/asm/Collision/CollisionUtil.o\
 	$(BUILD_DIR)/asm/Collision/CCollidableSphere.o\
-	$(BUILD_DIR)/asm/Collision/CMaterialFilter.o\
+	$(BUILD_DIR)/src/Collision/CMaterialFilter.o\
 	$(BUILD_DIR)/asm/Collision/COBBox.o\
 	$(BUILD_DIR)/src/Collision/CMRay.o\
 
diff --git a/src/Collision/CMaterialFilter.cpp b/src/Collision/CMaterialFilter.cpp
index 0a4668cf..d0714596 100644
--- a/src/Collision/CMaterialFilter.cpp
+++ b/src/Collision/CMaterialFilter.cpp
@@ -7,18 +7,11 @@ bool CMaterialFilter::Passes(const CMaterialList& other) const {
   case kFT_Always:
     return true;
   case kFT_Include:
-    return other.SharesMaterials(include) != 0 ? true : false;
+    return other.SharesMaterials(include);
   case kFT_Exclude:
-    return other.SharesMaterials(exclude) == 0;
-  case kFT_IncludeExclude: {
-    bool ret = false;
-    if (other.SharesMaterials(include) != 0) {
-      if (other.SharesMaterials(exclude) == 0) {
-        ret = true;
-      }
-    }
-    return ret;
-  }
+    return !other.SharesMaterials(exclude);
+  case kFT_IncludeExclude:
+    return other.SharesMaterials(include) && !other.SharesMaterials(exclude);
   default:
     return true;
   }