diff --git a/src/api/l_physics_world.c b/src/api/l_physics_world.c
index 53113367..58469ac4 100644
--- a/src/api/l_physics_world.c
+++ b/src/api/l_physics_world.c
@@ -392,8 +392,8 @@ static int l_lovrWorldEnableCollisionBetween(lua_State* L) {
 
 static int l_lovrWorldIsCollisionEnabledBetween(lua_State* L) {
   World* world = luax_checktype(L, 1, World);
-  const char* tag1 = luaL_checkstring(L, 2);
-  const char* tag2 = luaL_checkstring(L, 3);
+  const char* tag1 = lua_tostring(L, 2);
+  const char* tag2 = lua_tostring(L, 3);
   lua_pushboolean(L, lovrWorldIsCollisionEnabledBetween(world, tag1, tag2));
   return 1;
 }
diff --git a/src/modules/physics/physics.c b/src/modules/physics/physics.c
index 9ab986ad..efc39206 100644
--- a/src/modules/physics/physics.c
+++ b/src/modules/physics/physics.c
@@ -401,35 +401,38 @@ const char* lovrWorldGetTagName(World* world, uint32_t tag) {
   return (tag == NO_TAG) ? NULL : world->tags[tag];
 }
 
-int lovrWorldDisableCollisionBetween(World* world, const char* tag1, const char* tag2) {
+void lovrWorldDisableCollisionBetween(World* world, const char* tag1, const char* tag2) {
   uint32_t i = findTag(world, tag1);
   uint32_t j = findTag(world, tag2);
+
   if (i == NO_TAG || j == NO_TAG) {
-    return NO_TAG;
+    return;
   }
 
   world->masks[i] &= ~(1 << j);
   world->masks[j] &= ~(1 << i);
-  return 0;
+  return;
 }
 
-int lovrWorldEnableCollisionBetween(World* world, const char* tag1, const char* tag2) {
+void lovrWorldEnableCollisionBetween(World* world, const char* tag1, const char* tag2) {
   uint32_t i = findTag(world, tag1);
   uint32_t j = findTag(world, tag2);
+
   if (i == NO_TAG || j == NO_TAG) {
-    return NO_TAG;
+    return;
   }
 
   world->masks[i] |= (1 << j);
   world->masks[j] |= (1 << i);
-  return 0;
+  return;
 }
 
-int lovrWorldIsCollisionEnabledBetween(World* world, const char* tag1, const char* tag2) {
+bool lovrWorldIsCollisionEnabledBetween(World* world, const char* tag1, const char* tag2) {
   uint32_t i = findTag(world, tag1);
   uint32_t j = findTag(world, tag2);
+
   if (i == NO_TAG || j == NO_TAG) {
-    return NO_TAG;
+    return true;
   }
 
   return (world->masks[i] & (1 << j)) && (world->masks[j] & (1 << i));
diff --git a/src/modules/physics/physics.h b/src/modules/physics/physics.h
index 91954821..2a52176f 100644
--- a/src/modules/physics/physics.h
+++ b/src/modules/physics/physics.h
@@ -67,9 +67,9 @@ void lovrWorldSetAngularDamping(World* world, float damping, float threshold);
 bool lovrWorldIsSleepingAllowed(World* world);
 void lovrWorldSetSleepingAllowed(World* world, bool allowed);
 const char* lovrWorldGetTagName(World* world, uint32_t tag);
-int lovrWorldDisableCollisionBetween(World* world, const char* tag1, const char* tag2);
-int lovrWorldEnableCollisionBetween(World* world, const char* tag1, const char* tag2);
-int lovrWorldIsCollisionEnabledBetween(World* world, const char* tag1, const char* tag);
+void lovrWorldDisableCollisionBetween(World* world, const char* tag1, const char* tag2);
+void lovrWorldEnableCollisionBetween(World* world, const char* tag1, const char* tag2);
+bool lovrWorldIsCollisionEnabledBetween(World* world, const char* tag1, const char* tag);
 
 // Collider