diff --git a/lang/bytecode.c b/lang/bytecode.c
index 45ca1e6..f7054bf 100644
--- a/lang/bytecode.c
+++ b/lang/bytecode.c
@@ -54,7 +54,7 @@
 			const char *dispatch = (const char *)pos_code;
 			struct object *obj = *(--pos_stack);
 			struct object **args = pos_stack - 2;
-			dispatch_call(obj, dispatch, 1, args);
+			dispatch_call(obj, dispatch, 2, args);
 			break;
 		}
 		case OP_NULL: {
diff --git a/lang/func.c b/lang/func.c
index 5d41a56..b331fa7 100644
--- a/lang/func.c
+++ b/lang/func.c
@@ -28,7 +28,7 @@
 }
 
 static void func_call(struct object *obj, int arg_count, struct object **args) {
-	abort_if(arg_count != 0, "func_add called with more than 0 arguments");
+	abort_if(arg_count != 1, "func_add called with more than 1 argument");
 	abort_if(obj->class_data != &func_class, "func_call obj is not a func");
 	bytecode_run(args);
 }
diff --git a/lang/main.c b/lang/main.c
index 595715d..1fa6b33 100644
--- a/lang/main.c
+++ b/lang/main.c
@@ -9,7 +9,7 @@
 	struct object *numA = number_create(5);
 	struct object *numB = number_create(3);
 	struct object *args[] = {NULL, numB};
-	dispatch_call(numA, "Add", 1, &args[0]);
+	dispatch_call(numA, "Add", 2, &args[0]);
 	struct object *numC = args[0];
 	printf("numC value is %i\n", number_value(numC));
 	printf("numA is %p\n", (void *)numA);
@@ -27,7 +27,7 @@
 	struct object *funcA = func_create();
 	// args must have space for a stack
 	struct object *args[8] = {NULL};
-	dispatch_call(funcA, "Call", 0, &args[0]);
+	dispatch_call(funcA, "Call", 1, &args[0]);
 	printf("funcA is %p\n", (void *)funcA);
 	object_drop(&funcA);
 	printf("funcA is %p\n", (void *)funcA);
diff --git a/lang/number.c b/lang/number.c
index b5bfcec..ef76256 100644
--- a/lang/number.c
+++ b/lang/number.c
@@ -37,7 +37,8 @@
 
 static void number_add(
 	struct object *obj, int arg_count, struct object **args) {
-	abort_if(arg_count != 1, "number_add called with more than 1 argument");
+	abort_if(
+		arg_count != 2, "number_add called with more than 2 arguments");
 	abort_if(args[0] != NULL, "number_add return is not NULL");
 	abort_if(!args[1], "number_add arg is NULL");
 	abort_if(obj->class_data != &num_class,