diff --git a/infrastructure-centred/owlps-listener/owlps-listener.h b/infrastructure-centred/owlps-listener/owlps-listener.h
index 394d1c0..e5a0afd 100644
--- a/infrastructure-centred/owlps-listener/owlps-listener.h
+++ b/infrastructure-centred/owlps-listener/owlps-listener.h
@@ -46,7 +46,7 @@
 
 
 /* Arguments & program configuration */
-#define OPTIONS "d:f:kl:m:p:qr:vw:" // getopt string
+#define OPTIONS "d:f:hkl:m:p:qr:vw:" // getopt string
 #define DEFAULT_CONFIG_FILE "/usr/local/etc/owlps/owlps-listener.conf"
 enum {MODE_ACTIVE = 'a', MODE_PASSIVE = 'p', MODE_MIXED = 'm'} ;
 
diff --git a/infrastructure-centred/owlps-listener/owlps-listenerd.c b/infrastructure-centred/owlps-listener/owlps-listenerd.c
index 47b0023..3e4c082 100644
--- a/infrastructure-centred/owlps-listener/owlps-listenerd.c
+++ b/infrastructure-centred/owlps-listener/owlps-listenerd.c
@@ -140,6 +140,9 @@ int main(int argc, char *argv[])
 	  break ;
 	case 'f' : // Config file
 	  break ; // (already parsed)
+        case 'h' :
+          print_usage(argv[0]) ;
+          exit(0) ;
 	case 'k' :
 #ifdef USE_PTHREAD
 	  SET_KEEP_MONITOR() ;
@@ -692,6 +695,7 @@ void print_usage(char *prog)
          " [-w wifi_iface] [-k] [-v | -q]\n"
 
          "Main options:\n"
+         "\t-h\t\tPrint this help.\n"
          "\t-f config_file\tUse 'config_file' instead of the default"
          " configuration file (%s). Available only if program was"
          " compiled with libconfuse.\n"