diff --git a/rot13/rot13.c b/rot13/rot13.c
index 08915be..eec1117 100644
--- a/rot13/rot13.c
+++ b/rot13/rot13.c
@@ -47,8 +47,6 @@ static char alpha_upper[] = "ABCDEFGHIJKLMNOPQRSTUVWXYZABCDEFGHIJKLM";
 static char alpha_lower[] = "abcdefghijklmnopqrstuvwxyzabcdefghijklm";
 
 int main(int argc, char *argv[]){
-	char *a; /* easier than doing freaky math */
-	CHARACTER c;
 
 	if(argc > 1){
 		fprintf(stderr, "Usage: %s\n",
@@ -57,12 +55,17 @@ int main(int argc, char *argv[]){
 		return EX_USAGE;
 	}
 
-	while((c = getc(stdin)) != EOF)
-		if(isalpha(c)){
-			a = isupper(c) ? alpha_upper : alpha_lower;
-			putc(a[c - a[0] + 13], stdout);
-		}else
-			putc(c, stdout);
+	{ /* rot13 */
+		char *a; /* easier than doing freaky math */
+		CHARACTER c;
+
+		while((c = GETC(stdin)) != ENDOFFILE)
+			if(isalpha(c)){
+				a = isupper(c) ? alpha_upper : alpha_lower;
+				PUTC(a[c - a[0] + 13], stdout);
+			}else
+				PUTC(c, stdout);
+	}
 
 	return EX_OK;
 }