diff --git a/codegen/luajit/runtime/runtime.lua b/codegen/luajit/runtime/runtime.lua
index d739931..5490847 100644
--- a/codegen/luajit/runtime/runtime.lua
+++ b/codegen/luajit/runtime/runtime.lua
@@ -324,6 +324,8 @@ do
 	trunc.i64_f64 = i64
 	trunc.u64_f32 = i64
 	trunc.u64_f64 = i64
+	trunc.f32 = truncate
+	trunc.f64 = truncate
 
 	function extend.i32_i8(num)
 		num = bit_and(num, 0xFF)