diff --git a/cmdutils.c b/cmdutils.c
index 36ef1a9383b67b2c02c4fa19d6ad4868540ad43b..d5095cec808e41d3086246f3f47a246d2b0efdbf 100644
--- a/cmdutils.c
+++ b/cmdutils.c
@@ -98,6 +98,8 @@ unknown_opt:
                 *po->u.int_arg = 1;
             } else if (po->flags & OPT_INT) {
                 *po->u.int_arg = atoi(arg);
+            } else if (po->flags & OPT_INT64) {
+                *po->u.int64_arg = atoll(arg);
             } else if (po->flags & OPT_FLOAT) {
                 *po->u.float_arg = atof(arg);
             } else if (po->flags & OPT_FUNC2) {
diff --git a/cmdutils.h b/cmdutils.h
index 49b753dcf36ff0bcade3e5edd568804a3084ebb8..13a61c09df96eea556810114f9ac5ab3412a5453 100644
--- a/cmdutils.h
+++ b/cmdutils.h
@@ -36,12 +36,14 @@ typedef struct {
 #define OPT_FLOAT  0x0100
 #define OPT_SUBTITLE 0x0200
 #define OPT_FUNC2  0x0400
+#define OPT_INT64  0x0800
      union {
         void (*func_arg)(const char *); //FIXME passing error code as int return would be nicer then exit() in the func
         int *int_arg;
         char **str_arg;
         float *float_arg;
         int (*func2_arg)(const char *, const char *);
+        int64_t *int64_arg;
     } u;
     const char *help;
     const char *argname;