diff --git a/vp9/encoder/vp9_firstpass.c b/vp9/encoder/vp9_firstpass.c
index 6ba2a4fc9558241bd54a344058983711bc525650..8eab71c2651afa4a500ef552519d3c39eb61e443 100644
--- a/vp9/encoder/vp9_firstpass.c
+++ b/vp9/encoder/vp9_firstpass.c
@@ -1580,7 +1580,7 @@ void define_fixed_arf_period(VP9_COMP *cpi) {
 
 // Analyse and define a gf/arf group.
 static void define_gf_group(VP9_COMP *cpi, FIRSTPASS_STATS *this_frame) {
-  FIRSTPASS_STATS next_frame;
+  FIRSTPASS_STATS next_frame = { 0 };
   FIRSTPASS_STATS *start_pos;
   int i;
   double boost_score = 0.0;
@@ -1616,8 +1616,6 @@ static void define_gf_group(VP9_COMP *cpi, FIRSTPASS_STATS *this_frame) {
 
   start_pos = cpi->twopass.stats_in;
 
-  vpx_memset(&next_frame, 0, sizeof(next_frame)); // assure clean
-
   // Load stats for the current frame.
   mod_frame_err = calculate_modified_err(cpi, this_frame);
 
diff --git a/vp9/encoder/vp9_mbgraph.c b/vp9/encoder/vp9_mbgraph.c
index 57fa0106ed820e40081954de862a9f09f61d288a..1baea643d8c584ab8ddf5ed2cf9789090263ddd6 100644
--- a/vp9/encoder/vp9_mbgraph.c
+++ b/vp9/encoder/vp9_mbgraph.c
@@ -241,9 +241,7 @@ static void update_mbgraph_frame_stats(VP9_COMP *cpi,
   int mb_col, mb_row, offset = 0;
   int mb_y_offset = 0, arf_y_offset = 0, gld_y_offset = 0;
   int_mv arf_top_mv, gld_top_mv;
-  MODE_INFO mi_local;
-
-  vp9_zero(mi_local);
+  MODE_INFO mi_local = { { 0 } };
 
   // Set up limit values for motion vectors to prevent them extending outside the UMV borders
   arf_top_mv.as_int = 0;
@@ -309,7 +307,7 @@ static void update_mbgraph_frame_stats(VP9_COMP *cpi,
 static void separate_arf_mbs(VP9_COMP *cpi) {
   VP9_COMMON *const cm = &cpi->common;
   int mb_col, mb_row, offset, i;
-  int ncnt[4];
+  int ncnt[4] = { 0 };
   int n_frames = cpi->mbgraph_n_frames;
 
   int *arf_not_zz;
@@ -345,7 +343,6 @@ static void separate_arf_mbs(VP9_COMP *cpi) {
     }
   }
 
-  vpx_memset(ncnt, 0, sizeof(ncnt));
   for (offset = 0, mb_row = 0; mb_row < cm->mb_rows;
        offset += cm->mb_cols, mb_row++) {
     for (mb_col = 0; mb_col < cm->mb_cols; mb_col++) {
diff --git a/vp9/encoder/vp9_rdopt.c b/vp9/encoder/vp9_rdopt.c
index b2fe0092532be9824ff697b091af13470067d682..e0ff090e19151a360490c8b27214c7de35898919 100644
--- a/vp9/encoder/vp9_rdopt.c
+++ b/vp9/encoder/vp9_rdopt.c
@@ -3142,7 +3142,7 @@ int64_t vp9_rd_pick_inter_mode_sb(VP9_COMP *cpi, MACROBLOCK *x,
   int comp_pred, i;
   int_mv frame_mv[MB_MODE_COUNT][MAX_REF_FRAMES];
   struct buf_2d yv12_mb[4][MAX_MB_PLANE];
-  int_mv single_newmv[MAX_REF_FRAMES];
+  int_mv single_newmv[MAX_REF_FRAMES] = { { 0 } };
   static const int flag_list[4] = { 0, VP9_LAST_FLAG, VP9_GOLD_FLAG,
                                     VP9_ALT_FLAG };
   int idx_list[4] = {0,
@@ -3157,7 +3157,7 @@ int64_t vp9_rd_pick_inter_mode_sb(VP9_COMP *cpi, MACROBLOCK *x,
   int64_t best_pred_rd[NB_PREDICTION_TYPES];
   int64_t best_filter_rd[VP9_SWITCHABLE_FILTERS + 1];
   int64_t best_filter_diff[VP9_SWITCHABLE_FILTERS + 1];
-  MB_MODE_INFO best_mbmode;
+  MB_MODE_INFO best_mbmode = { 0 };
   int j;
   int mode_index, best_mode_index = 0;
   unsigned int ref_costs_single[MAX_REF_FRAMES], ref_costs_comp[MAX_REF_FRAMES];
@@ -3202,8 +3202,6 @@ int64_t vp9_rd_pick_inter_mode_sb(VP9_COMP *cpi, MACROBLOCK *x,
 
   estimate_ref_frame_costs(cpi, segment_id, ref_costs_single, ref_costs_comp,
                            &comp_mode_p);
-  vpx_memset(&best_mbmode, 0, sizeof(best_mbmode));
-  vpx_memset(&single_newmv, 0, sizeof(single_newmv));
 
   for (i = 0; i < NB_PREDICTION_TYPES; ++i)
     best_pred_rd[i] = INT64_MAX;
diff --git a/vp9/encoder/vp9_segmentation.c b/vp9/encoder/vp9_segmentation.c
index 9564edc849dec0d516aae108fff90ff4b2a3b971..3db91cacaf5ba9778216283a9769e4ff7ee6a99c 100644
--- a/vp9/encoder/vp9_segmentation.c
+++ b/vp9/encoder/vp9_segmentation.c
@@ -217,9 +217,9 @@ void vp9_choose_segmap_coding_method(VP9_COMP *cpi) {
 
   int i, tile_col, mi_row, mi_col;
 
-  int temporal_predictor_count[PREDICTION_PROBS][2];
-  int no_pred_segcounts[MAX_SEGMENTS];
-  int t_unpred_seg_counts[MAX_SEGMENTS];
+  int temporal_predictor_count[PREDICTION_PROBS][2] = { { 0 } };
+  int no_pred_segcounts[MAX_SEGMENTS] = { 0 };
+  int t_unpred_seg_counts[MAX_SEGMENTS] = { 0 };
 
   vp9_prob no_pred_tree[SEG_TREE_PROBS];
   vp9_prob t_pred_tree[SEG_TREE_PROBS];
@@ -233,10 +233,6 @@ void vp9_choose_segmap_coding_method(VP9_COMP *cpi) {
   vpx_memset(seg->tree_probs, 255, sizeof(seg->tree_probs));
   vpx_memset(seg->pred_probs, 255, sizeof(seg->pred_probs));
 
-  vpx_memset(no_pred_segcounts, 0, sizeof(no_pred_segcounts));
-  vpx_memset(t_unpred_seg_counts, 0, sizeof(t_unpred_seg_counts));
-  vpx_memset(temporal_predictor_count, 0, sizeof(temporal_predictor_count));
-
   // First of all generate stats regarding how well the last segment map
   // predicts this one
   for (tile_col = 0; tile_col < 1 << cm->log2_tile_cols; tile_col++) {