diff --git a/c-programming/sys/cpuid_vendor_id.mod.c b/c-programming/sys/cpuid_vendor_id.mod.c
index 9e722bf..89232a2 100644
--- a/c-programming/sys/cpuid_vendor_id.mod.c
+++ b/c-programming/sys/cpuid_vendor_id.mod.c
@@ -58,7 +58,7 @@ static inline void native_cpuid(unsigned int function_id, cpuid_t r) {
 #endif
 }
 
-#define VENDOR_ID_LEN 13
+#define VENDOR_ID_LEN 12
 
 /*
  * FIXME: you have to make sure the vendor argument is at least lengthed
@@ -74,12 +74,13 @@ static inline void cpuid_vendor_id(char vendor[VENDOR_ID_LEN]) {
 	((unsigned*) vendor)[0] = v[EBX];
 	((unsigned*) vendor)[1] = v[EDX];
 	((unsigned*) vendor)[2] = v[ECX];
-	vendor[VENDOR_ID_LEN - 1] = '\0';
 }
 
 int main(void) {
 	char vendor_string[VENDOR_ID_LEN];
 	cpuid_vendor_id(vendor_string);
-	printf("CPU Vendor ID: '%s'\n", vendor_string);
+	fputs("CPU Vendor ID: '", stdout);
+	fwrite(vendor_string, sizeof(char), 12, stdout);
+	fputs("'\n", stdout);
 	return 0;
 }