diff --git a/c/mapping/mapper_stats2.c b/c/mapping/mapper_stats2.c
index 9a8983d60..8a9d09d2a 100644
--- a/c/mapping/mapper_stats2.c
+++ b/c/mapping/mapper_stats2.c
@@ -37,6 +37,7 @@ typedef struct _mapper_stats2_state_t {
 
 	lhmslv_t* groups;
 	int     do_verbose;
+	int     do_iterative_stats;
 } mapper_stats2_state_t;
 
 typedef stats2_t* stats2_alloc_func_t(char* value_field_name_1, char* value_field_name_2, char* stats2_name, int do_verbose);
@@ -45,7 +46,7 @@ typedef stats2_t* stats2_alloc_func_t(char* value_field_name_1, char* value_fiel
 static void      mapper_stats2_usage(FILE* o, char* argv0, char* verb);
 static mapper_t* mapper_stats2_parse_cli(int* pargi, int argc, char** argv);
 static mapper_t* mapper_stats2_alloc(slls_t* paccumulator_names, slls_t* pvalue_field_name_pairs,
-	slls_t* pgroup_by_field_names, int do_verbose);
+	slls_t* pgroup_by_field_names, int do_verbose, int do_iterative_stats);
 static void      mapper_stats2_free(void* pvstate);
 static sllv_t*   mapper_stats2_process(lrec_t* pinrec, context_t* pctx, void* pvstate);
 static void      mapper_stats2_ingest(lrec_t* pinrec, context_t* pctx, mapper_stats2_state_t* pstate);
@@ -103,7 +104,8 @@ static mapper_t* mapper_stats2_parse_cli(int* pargi, int argc, char** argv) {
 	slls_t* paccumulator_names    = NULL;
 	slls_t* pvalue_field_names    = NULL;
 	slls_t* pgroup_by_field_names = slls_alloc();
-	int     do_verbose = FALSE;
+	int     do_verbose            = FALSE;
+	int     do_iterative_stats    = FALSE;
 
 	char* verb = argv[(*pargi)++];
 
@@ -127,7 +129,8 @@ static mapper_t* mapper_stats2_parse_cli(int* pargi, int argc, char** argv) {
 		return NULL;
 	}
 
-	return mapper_stats2_alloc(paccumulator_names, pvalue_field_names, pgroup_by_field_names, do_verbose);
+	return mapper_stats2_alloc(paccumulator_names, pvalue_field_names, pgroup_by_field_names,
+		do_verbose, do_iterative_stats);
 }
 
 // ================================================================
@@ -272,7 +275,7 @@ static sllv_t* mapper_stats2_emit(mapper_stats2_state_t* pstate) {
 
 // ----------------------------------------------------------------
 static mapper_t* mapper_stats2_alloc(slls_t* paccumulator_names, slls_t* pvalue_field_name_pairs,
-	slls_t* pgroup_by_field_names, int do_verbose)
+	slls_t* pgroup_by_field_names, int do_verbose, int do_iterative_stats)
 {
 	mapper_t* pmapper = mlr_malloc_or_die(sizeof(mapper_t));