diff --git a/c/cli/argparse.c b/c/cli/argparse.c
index 5b95a951f..e67bada41 100644
--- a/c/cli/argparse.c
+++ b/c/cli/argparse.c
@@ -6,6 +6,7 @@
 typedef enum _ap_flag_t {
 	AP_INT_VALUE_FLAG,
 	AP_INT_FLAG,
+	AP_LONG_LONG_FLAG,
 	AP_DOUBLE_FLAG,
 	AP_STRING_FLAG,
 	AP_STRING_LIST_FLAG,
@@ -86,6 +87,9 @@ void ap_define_int_value_flag(ap_state_t* pstate, char* flag_name, int intval, i
 void ap_define_int_flag(ap_state_t* pstate, char* flag_name, int* pintval) {
 	sllv_append(pstate->pflag_defs, ap_flag_def_alloc(flag_name, AP_INT_FLAG, 0, pintval, 2));
 }
+void ap_define_long_long_flag(ap_state_t* pstate, char* flag_name, long long* pintval) {
+	sllv_append(pstate->pflag_defs, ap_flag_def_alloc(flag_name, AP_LONG_LONG_FLAG, 0, pintval, 2));
+}
 
 void ap_define_float_flag(ap_state_t* pstate, char* flag_name, double* pdoubleval) {
 	sllv_append(pstate->pflag_defs, ap_flag_def_alloc(flag_name, AP_DOUBLE_FLAG, 0, pdoubleval, 2));
@@ -148,6 +152,13 @@ int ap_parse_aux(ap_state_t* pstate, char* verb, int* pargi, int argc, char** ar
 				fprintf(stderr, "\n");
 			}
 
+		} else if (pdef->type == AP_LONG_LONG_FLAG) {
+			if (sscanf(argv[argi+1], "%lld", (long long *)pdef->pval) != 1) {
+				fprintf(stderr, "%s %s: couldn't parse \"%s\" after \"%s\" as integer.\n",
+					argv[0], verb, argv[argi+1], argv[argi]);
+				fprintf(stderr, "\n");
+			}
+
 		} else if (pdef->type == AP_DOUBLE_FLAG) {
 			if (!mlr_try_float_from_string(argv[argi+1], (double *)pdef->pval)) {
 				fprintf(stderr, "%s %s: couldn't parse \"%s\" after \"%s\" as double.\n",
diff --git a/c/cli/argparse.h b/c/cli/argparse.h
index c15b78f60..be5148850 100644
--- a/c/cli/argparse.h
+++ b/c/cli/argparse.h
@@ -19,6 +19,7 @@ void         ap_define_true_flag(ap_state_t* pstate, char* flag_name, int* pintv
 void        ap_define_false_flag(ap_state_t* pstate, char* flag_name, int* pintval);
 void    ap_define_int_value_flag(ap_state_t* pstate, char* flag_name, int value, int* pintval);
 void          ap_define_int_flag(ap_state_t* pstate, char* flag_name, int* pintval);
+void    ap_define_long_long_flag(ap_state_t* pstate, char* flag_name, long long* pintval);
 void       ap_define_float_flag(ap_state_t* pstate, char* flag_name, double* pdoubleval);
 void       ap_define_string_flag(ap_state_t* pstate, char* flag_name, char** pstring);
 void  ap_define_string_list_flag(ap_state_t* pstate, char* flag_name, slls_t** pplist);
diff --git a/c/todo.txt b/c/todo.txt
index 20d0f1311..3af0d306b 100644
--- a/c/todo.txt
+++ b/c/todo.txt
@@ -11,6 +11,9 @@ BUGFIXES
 ================================================================
 TOP-OF-LIST SUMMARY
 
+! feature: record-repeater w/ key field(s). UT & mld.
+! feature: stats1 weighted by count (or other) field?
+
 ? make a 3.5.0 with nest, shuffle, put/filter -f, cat -n bugfix, etc.? after valgrinds ...
 * rh/fedora/centos mlr-3.4.0
 
@@ -37,9 +40,6 @@ TOP-OF-LIST SUMMARY
 * dsls deps still not quite right?
 * faqent re nidx output: '$9 = ...' doesn't make it the 9th output field.
 
-! feature: stats1 weighted by count (or other) field?
-! feature: record-repeater w/ key field(s)?
-
 ================================================================
 * relcut material since 3.4.0:
   BIG:
diff --git a/doc/mlr.1 b/doc/mlr.1
index 4f2f777e1..92a15da86 100644
--- a/doc/mlr.1
+++ b/doc/mlr.1
@@ -854,8 +854,10 @@ mlr reorder -e -f a,b sends input record "d=4,b=2,a=1,c=3" to "d=4,c=3,a=1,b=2".
 .\}
 .nf
 Usage: mlr repeat [options]
--f {field name}    xxx put my description here please
-xxx describe me please.
+Copies input records to output records multiple times.
+-n {repeat count}  Repeat each input record this many times.
+-f {field name}    Same, but take the repeat count from the specified field name
+                   of each input record.
 .fi
 .if n \{\
 .RE