diff --git a/include/benchmark/benchmark.h b/include/benchmark/benchmark.h
index 6be8c12a..a6015b81 100644
--- a/include/benchmark/benchmark.h
+++ b/include/benchmark/benchmark.h
@@ -292,7 +292,7 @@ BENCHMARK_UNUSED static int stream_init_anchor = InitializeStreams();
 
 
 #if (!defined(__GNUC__) && !defined(__clang__)) || defined(__pnacl__) || \
-    defined(EMSCRIPTN)
+    defined(__EMSCRIPTEN__)
 # define BENCHMARK_HAS_NO_INLINE_ASSEMBLY
 #endif
 
diff --git a/src/internal_macros.h b/src/internal_macros.h
index f7b9203e..edb8a5c0 100644
--- a/src/internal_macros.h
+++ b/src/internal_macros.h
@@ -57,7 +57,7 @@
   #define BENCHMARK_OS_LINUX 1
 #elif defined(__native_client__)
   #define BENCHMARK_OS_NACL 1
-#elif defined(EMSCRIPTEN)
+#elif defined(__EMSCRIPTEN__)
   #define BENCHMARK_OS_EMSCRIPTEN 1
 #elif defined(__rtems__)
   #define BENCHMARK_OS_RTEMS 1