--- parse_options_getopt.c-orig	2014-03-11 01:43:10.815683943 -0300
+++ parse_options_getopt.c	2014-03-11 01:44:43.375560353 -0300
@@ -98,9 +98,9 @@
 #endif
 		switch (optcode) {
 			case 'h':
-				printf(usage_message);
+				printf("%s", usage_message);
 				printf("\n");
-				printf(help_message);
+				printf("%s", help_message);
 				exit(EXIT_SUCCESS);
 
 			case 'f':
@@ -138,7 +138,7 @@
 				exit(EXIT_SUCCESS);
 
 			case '?':
-				printf(usage_message);
+				printf("%s", usage_message);
 				exit(EXIT_SUCCESS);
 
 			case 0:
@@ -195,7 +195,7 @@
 	}
 	else {
 #ifndef INLINE_MODE
-		printf(usage_message);
+		printf("%s", usage_message);
 		exit(EXIT_FAILURE);
 #endif
 	}