diff --git a/print_help.c b/print_help.c
index 06270d20f..40c1723ef 100644
--- a/print_help.c
+++ b/print_help.c
@@ -13,6 +13,10 @@
 
 #define HELP_ERR "Could not show help message\n"
 
+/* defined in common.h */
+ssize_t write_loop(int fd, char *buff, size_t count);
+
+
 void print_help( char *c, int fd )
 {
 	char cmd[ CMD_LEN];