diff --git a/codegen/luau/runtime/runtime.lua b/codegen/luau/runtime/runtime.lua
index 0e99f3f..9b8fc3c 100644
--- a/codegen/luau/runtime/runtime.lua
+++ b/codegen/luau/runtime/runtime.lua
@@ -182,12 +182,12 @@ do
 	local bit_countrz = bit32.countrz
 
 	local function popcnt_i32(num)
-        num = bit_and(num, 0x55555555) + bit_and(bit_rshift(num, 1),  0x55555555)
-        num = bit_and(num, 0x33333333) + bit_and(bit_rshift(num, 2),  0x33333333)
-        num = bit_and(num, 0x0f0f0f0f) + bit_and(bit_rshift(num, 4),  0x0f0f0f0f)
-        num = bit_and(num, 0x00ff00ff) + bit_and(bit_rshift(num, 8),  0x00ff00ff)
-        num = bit_and(num, 0x0000ffff) + bit_and(bit_rshift(num, 16), 0x0000ffff)
-		return num
+		num = num - bit_and(bit_rshift(num, 1), 0x55555555)
+		num = bit_and(num, 0x33333333) + bit_and(bit_rshift(num, 2), 0x33333333)
+		num = bit_and((num + bit_rshift(num, 4)), 0x0F0F0F0F)
+		num = num + bit_rshift(num, 8)
+		num = num + bit_rshift(num, 16)
+		return bit_and(num, 0x0000003F)
 	end
 
 	popcnt.i32 = popcnt_i32