diff --git a/include/scn/detail/pp_detect.h b/include/scn/detail/pp_detect.h
index e8c50813..1a7f025a 100644
--- a/include/scn/detail/pp_detect.h
+++ b/include/scn/detail/pp_detect.h
@@ -50,8 +50,9 @@
 #include <ciso646>
 #endif
 
-#define SCN_COMPILER(major, minor, patch) \
-    ((major)*10'000'000 + (minor)*10'000 + (patch))
+#define SCN_COMPILER(major, minor, patch)                                 \
+    ((major) * 10000000 /* 10,000,000 */ + (minor) * 10000 /* 10,000 */ + \
+     (patch))
 
 #ifdef __INTEL_COMPILER
 // Intel