diff --git a/include/maat.h b/include/maat.h
index dc7e35b..e3dfaa2 100644
--- a/include/maat.h
+++ b/include/maat.h
@@ -349,6 +349,9 @@ size_t maat_state_get_indirect_hit_group_cnt(struct maat_state *state);
 int maat_state_get_last_hit_group_ids(struct maat_state *state,
                                       long long *group_id_array,
                                       size_t array_size);
+
+size_t maat_state_get_last_hit_group_id_cnt(struct maat_state *state);
+
 #ifdef __cplusplus
 }
 #endif
diff --git a/src/inc_internal/maat_compile.h b/src/inc_internal/maat_compile.h
index 371b4bd..aeec840 100644
--- a/src/inc_internal/maat_compile.h
+++ b/src/inc_internal/maat_compile.h
@@ -123,6 +123,8 @@ size_t compile_state_get_last_hit_group_id(struct compile_state *compile_state,
                                            long long *group_id_arary,
                                            size_t array_size);
 
+size_t compile_state_get_last_hit_group_id_cnt(struct compile_state *compile_state);
+
 int compile_state_get_compile_table_id(struct compile_state *compile_state,
                                        long long compile_id);
 
diff --git a/src/maat_api.c b/src/maat_api.c
index dbc633b..2dad86e 100644
--- a/src/maat_api.c
+++ b/src/maat_api.c
@@ -2151,4 +2151,13 @@ int maat_state_get_last_hit_group_ids(struct maat_state *state,
 
     return compile_state_get_last_hit_group_id(state->compile_state,
                                                group_id_array, array_size);
+}
+
+size_t maat_state_get_last_hit_group_id_cnt(struct maat_state *state)
+{
+    if (NULL == state || NULL == state->compile_state) {
+        return 0;
+    }
+
+    return compile_state_get_last_hit_group_id_cnt(state->compile_state);
 }
\ No newline at end of file
diff --git a/src/maat_compile.c b/src/maat_compile.c
index 1ef59a8..66f6845 100644
--- a/src/maat_compile.c
+++ b/src/maat_compile.c
@@ -2578,6 +2578,11 @@ size_t compile_state_get_last_hit_group_id(struct compile_state *compile_state,
     return i;
 }
 
+size_t compile_state_get_last_hit_group_id_cnt(struct compile_state *compile_state)
+{
+    return utarray_len(compile_state->last_hit_group_ids);
+}
+
 size_t compile_state_get_direct_hit_groups(struct compile_state *compile_state,
                                            struct maat_hit_group *group_array,
                                            size_t array_size)
diff --git a/test/maat_framework_gtest.cpp b/test/maat_framework_gtest.cpp
index fa01ec8..3d07fc1 100644
--- a/test/maat_framework_gtest.cpp
+++ b/test/maat_framework_gtest.cpp
@@ -8877,8 +8877,9 @@ TEST_F(MaatCmdTest, HitGroup) {
     EXPECT_EQ(hit_groups[0].group_id, group11_id);
     EXPECT_EQ(hit_groups[0].vtable_id, http_req_table_id);
 
+    size_t n_last_hit_group = maat_state_get_last_hit_group_id_cnt(state);
     long long last_hit_group_ids[128] = {0};
-    size_t n_last_hit_group = maat_state_get_last_hit_group_ids(state, last_hit_group_ids, 128);
+    maat_state_get_last_hit_group_ids(state, last_hit_group_ids, 128);
     EXPECT_EQ(n_last_hit_group, 2);
     EXPECT_EQ(last_hit_group_ids[0], group1_id);
     EXPECT_EQ(last_hit_group_ids[1], group11_id);
@@ -8922,7 +8923,8 @@ TEST_F(MaatCmdTest, HitGroup) {
     EXPECT_EQ(hit_groups[0].group_id, group21_id);
     EXPECT_EQ(hit_groups[0].vtable_id, http_res_table_id);
     
-    n_last_hit_group = maat_state_get_last_hit_group_ids(state, last_hit_group_ids, 128);
+    n_last_hit_group = maat_state_get_last_hit_group_id_cnt(state);
+    maat_state_get_last_hit_group_ids(state, last_hit_group_ids, 128);
     EXPECT_EQ(n_last_hit_group, 2);
     EXPECT_EQ(last_hit_group_ids[0], group2_id);
     EXPECT_EQ(last_hit_group_ids[1], group21_id);
@@ -8986,7 +8988,8 @@ TEST_F(MaatCmdTest, HitGroup) {
     EXPECT_EQ(hit_groups[0].group_id, group1_id);
     EXPECT_EQ(hit_groups[0].vtable_id, keywords_table_id); //physical table(keywords_table) vtable_id is 0
 
-    n_last_hit_group = maat_state_get_last_hit_group_ids(state, last_hit_group_ids, 128);
+    n_last_hit_group = maat_state_get_last_hit_group_id_cnt(state);
+    maat_state_get_last_hit_group_ids(state, last_hit_group_ids, 128);
     EXPECT_EQ(n_last_hit_group, 2);
     EXPECT_EQ(last_hit_group_ids[0], group1_id);
     EXPECT_EQ(last_hit_group_ids[1], group11_id);