diff --git a/third_party/base/numerics/safe_math_shared_impl.h b/third_party/base/numerics/safe_math_shared_impl.h
index 6c2810c..3bda8823 100644
--- a/third_party/base/numerics/safe_math_shared_impl.h
+++ b/third_party/base/numerics/safe_math_shared_impl.h
@@ -17,14 +17,11 @@
 
 #include "third_party/base/numerics/safe_conversions.h"
 
-#ifdef __asmjs__
-// Optimized safe math instructions are incompatible with asmjs.
-#define BASE_HAS_OPTIMIZED_SAFE_MATH (0)
 // Where available use builtin math overflow support on Clang and GCC.
-#elif ((defined(__clang__) &&                                \
-        ((__clang_major__ > 3) ||                            \
-         (__clang_major__ == 3 && __clang_minor__ >= 4))) || \
-       (defined(__GNUC__) && __GNUC__ >= 5))
+#if ((defined(__clang__) &&                                \
+      ((__clang_major__ > 3) ||                            \
+       (__clang_major__ == 3 && __clang_minor__ >= 4))) || \
+     (defined(__GNUC__) && __GNUC__ >= 5))
 #include "third_party/base/numerics/safe_math_clang_gcc_impl.h"
 #define BASE_HAS_OPTIMIZED_SAFE_MATH (1)
 #else