diff --git a/core/runtime/procs_wasm32.odin b/core/runtime/procs_wasm32.odin
index 2b242bc90..06bf59fad 100644
--- a/core/runtime/procs_wasm32.odin
+++ b/core/runtime/procs_wasm32.odin
@@ -2,8 +2,8 @@
 package runtime
 
 @(link_name="__ashlti3", linkage="strong")
-__ashlti3 :: proc "c" (a: i64, b: i32) -> i64 {
-	input: transmute([2]i32)a
+__ashlti3 :: proc "c" (a: i64, b: u32) -> i64 {
+	input := transmute([2]i32)a
 	result: [2]i32
 	if b & 32 != 0 {
 		result[0] = 0