diff --git a/modules/control/http/macro.c b/modules/control/http/macro.c
index c515ea764d4944ca6e406f53d5b1042e195de638..a901be0b7e0c3c5756b7916ddb2a283708e940ed 100644
--- a/modules/control/http/macro.c
+++ b/modules/control/http/macro.c
@@ -150,7 +150,7 @@ void E_(MacroDo)( httpd_file_sys_t *p_args,
     }
 #define PRINT( str ) \
     ALLOC( strlen( str ) + 1 ); \
-    *pp_dst += sprintf( *pp_dst, str );
+    *pp_dst += sprintf( *pp_dst, "%s", str );
 
 #define PRINTS( str, s ) \
     ALLOC( strlen( str ) + strlen( s ) + 1 ); \