diff --git a/erpc_c/infra/erpc_basic_codec.cpp b/erpc_c/infra/erpc_basic_codec.cpp
index 6bdb68e3..656c228a 100644
--- a/erpc_c/infra/erpc_basic_codec.cpp
+++ b/erpc_c/infra/erpc_basic_codec.cpp
@@ -289,7 +289,7 @@ void BasicCodec::read(double &value)
 
 void BasicCodec::readPtr(uintptr_t &value)
 {
-    uint8_t ptrSize;
+    uint8_t ptrSize = 0;
 
     read(ptrSize);