diff --git a/src/keyboard_control.cpp b/src/keyboard_control.cpp
index 1ab052ba8..5fc0e8263 100644
--- a/src/keyboard_control.cpp
+++ b/src/keyboard_control.cpp
@@ -318,7 +318,7 @@ static bool is_utf8(int64_t ch) {
                 return false;
         }
 
-        unsigned char first_byte;
+        unsigned char first_byte = 0U;
         while (ch != 0) {
                 first_byte = ch & 0xff;
                 ch >>= 8;
diff --git a/src/rtp/pbuf.cpp b/src/rtp/pbuf.cpp
index f0547a65c..db07d0d34 100644
--- a/src/rtp/pbuf.cpp
+++ b/src/rtp/pbuf.cpp
@@ -243,12 +243,10 @@ void pbuf_destroy(struct pbuf *playout_buf) {
  */
 static void add_coded_unit(struct pbuf_node *node, rtp_packet * pkt)
 {
-        struct coded_data *tmp, *curr, *prv;
-
         assert(node->rtp_timestamp == pkt->ts);
         assert(node->cdata != NULL);
 
-        tmp = (struct coded_data *) malloc(sizeof(struct coded_data));
+        struct coded_data *tmp = (struct coded_data *) malloc(sizeof(struct coded_data));
         if (tmp == NULL) {
                 /* this is bad, out of memory, drop the packet... */
                 free(pkt);
@@ -264,7 +262,8 @@ static void add_coded_unit(struct pbuf_node *node, rtp_packet * pkt)
                 node->cdata->prv = tmp;
                 node->cdata = tmp;
         } else {
-                curr = node->cdata;
+                struct coded_data *curr = node->cdata;
+                struct coded_data *prv = NULL;
                 while (curr != NULL &&  ((int16_t)(tmp->seqno - curr->seqno) < 0)){
                         prv = curr;
                         curr = curr->nxt;
diff --git a/src/rtp/video_decoders.cpp b/src/rtp/video_decoders.cpp
index 89d5db5b5..0f077f793 100644
--- a/src/rtp/video_decoders.cpp
+++ b/src/rtp/video_decoders.cpp
@@ -1494,7 +1494,7 @@ int decode_video_frame(struct coded_data *cdata, void *decoder_data, struct pbuf
         rtp_packet *pckt = NULL;
         int prints=0;
         int max_substreams = decoder->max_substreams;
-        uint32_t ssrc;
+        uint32_t ssrc = 0U;
         unsigned int frame_size = 0;
 
         vector<uint32_t> buffer_num(max_substreams);
@@ -1506,9 +1506,9 @@ int decode_video_frame(struct coded_data *cdata, void *decoder_data, struct pbuf
         unique_ptr<map<int, int>[]> pckt_list(new map<int, int>[max_substreams]);
 
         int k = 0, m = 0, c = 0, seed = 0; // LDGM
-        int buffer_number, buffer_length;
-
-        int pt;
+        int buffer_number = 0;
+        int buffer_length = 0;
+        int pt = 0;
         bool buffer_swapped = false;
 
         perf_record(UVP_DECODEFRAME, cdata);
diff --git a/src/video_display/deltacast.cpp b/src/video_display/deltacast.cpp
index da8a94022..44daefecb 100644
--- a/src/video_display/deltacast.cpp
+++ b/src/video_display/deltacast.cpp
@@ -186,7 +186,7 @@ static int
 display_deltacast_reconfigure(void *state, struct video_desc desc)
 {
         struct state_deltacast            *s = (struct state_deltacast *)state;
-        int VideoStandard;
+        int VideoStandard = 0;
         int i;
         ULONG Result;