diff --git a/c-programming/sys/cpuid_vendor_id.mod.c b/c-programming/sys/cpuid_vendor_id.mod.c
index 31f7f34..de45efb 100644
--- a/c-programming/sys/cpuid_vendor_id.mod.c
+++ b/c-programming/sys/cpuid_vendor_id.mod.c
@@ -20,7 +20,7 @@
 #include <stdio.h>
 
 #ifdef _WIN32
-#include <intrin.h> // __cpuid()
+# include <intrin.h> // __cpuid()
 #endif
 
 typedef unsigned int cpuid_t[4];