diff --git a/lib/include/srslte/common/logger_stdout.h b/lib/include/srslte/common/logger_stdout.h
index 00e4ffa7a..b76faadaf 100644
--- a/lib/include/srslte/common/logger_stdout.h
+++ b/lib/include/srslte/common/logger_stdout.h
@@ -42,7 +42,10 @@ namespace srslte {
   {
   public:
     void log(std::string *msg) {
-      fprintf(stdout, "%s", msg->c_str());
+      if (msg) {
+        fprintf(stdout, "%s", msg->c_str());
+        delete msg;
+      }
     }
   };
 
diff --git a/lib/src/phy/fec/viterbi.c b/lib/src/phy/fec/viterbi.c
index 25d77ef36..4e5801b94 100644
--- a/lib/src/phy/fec/viterbi.c
+++ b/lib/src/phy/fec/viterbi.c
@@ -166,9 +166,15 @@ void free37_avx2_16bit(void *o) {
   if (q->symbols_uc) {
     free(q->symbols_uc);
   }
+  if (q->symbols_us) {
+    free(q->symbols_us);
+  }
   if (q->tmp) {
     free(q->tmp);
   }
+  if (q->tmp_s) {
+    free(q->tmp_s);
+  }
   delete_viterbi37_avx2_16bit(q->ptr);
 }