diff --git a/base/runtime/internal_i128.odin b/base/runtime/internal_i128.odin
index bae731e60..f4a0f90ed 100644
--- a/base/runtime/internal_i128.odin
+++ b/base/runtime/internal_i128.odin
@@ -4,6 +4,9 @@ package runtime
 
 import "base:intrinsics"
 
+@(private="file")
+IS_WASM :: ODIN_ARCH == .wasm32 || ODIN_ARCH == .wasm64p32
+
 @(link_name="__floattidf", linkage=RUNTIME_LINKAGE, require=RUNTIME_REQUIRE)
 floattidf :: proc "c" (a: i128) -> f64 {
 	DBL_MANT_DIG :: 53