diff --git a/easy_profiler_core/current_time.h b/easy_profiler_core/current_time.h
index 5e4a4af..4674820 100644
--- a/easy_profiler_core/current_time.h
+++ b/easy_profiler_core/current_time.h
@@ -119,13 +119,13 @@ static inline profiler::timestamp_t now()
       int64_t itc;
       asm("mov %0 = ar.itc" : "=r"(itc));
       return itc;
-    #elif defined(COMPILER_MSVC) && defined(_M_IX86)
+    #elif defined(_MSC_VER) && defined(_M_IX86)
       // Older MSVC compilers (like 7.x) don't seem to support the
       // __rdtsc intrinsic properly, so I prefer to use _asm instead
       // when I know it will work.  Otherwise, I'll use __rdtsc and hope
       // the code is being compiled with a non-ancient compiler.
       _asm rdtsc
-    #elif defined(COMPILER_MSVC)
+    #elif defined(_MSC_VER)
       return __rdtsc();
     #elif defined(__aarch64__)
       // System timer of ARMv8 runs at a different frequency than the CPU's.