diff --git a/src/arch/wasm/CodeGen.zig b/src/arch/wasm/CodeGen.zig
index b03d8cf14c..04ac8c4131 100644
--- a/src/arch/wasm/CodeGen.zig
+++ b/src/arch/wasm/CodeGen.zig
@@ -2650,12 +2650,18 @@ fn binOp(func: *CodeGen, lhs: WValue, rhs: WValue, ty: Type, op: Op) InnerError!
 
 fn binOpBigInt(func: *CodeGen, lhs: WValue, rhs: WValue, ty: Type, op: Op) InnerError!WValue {
     const mod = func.bin_file.base.options.module.?;
-    if (ty.intInfo(mod).bits > 128) {
+    const int_info = ty.intInfo(mod);
+    if (int_info.bits > 128) {
         return func.fail("TODO: Implement binary operation for big integers larger than 128 bits", .{});
     }
 
     switch (op) {
         .mul => return func.callIntrinsic("__multi3", &.{ ty.toIntern(), ty.toIntern() }, ty, &.{ lhs, rhs }),
+        .div => switch (int_info.signedness) {
+            .signed => return func.callIntrinsic("__udivti3", &.{ ty.toIntern(), ty.toIntern() }, ty, &.{ lhs, rhs }),
+            .unsigned => return func.callIntrinsic("__divti3", &.{ ty.toIntern(), ty.toIntern() }, ty, &.{ lhs, rhs }),
+        },
+        .rem => return func.callIntrinsic("__umodti3", &.{ ty.toIntern(), ty.toIntern() }, ty, &.{ lhs, rhs }),
         .shr => return func.callIntrinsic("__lshrti3", &.{ ty.toIntern(), .i32_type }, ty, &.{ lhs, rhs }),
         .shl => return func.callIntrinsic("__ashlti3", &.{ ty.toIntern(), .i32_type }, ty, &.{ lhs, rhs }),
         .xor => {