diff --git a/cmd/pcloudcc/control_tools.cpp b/cmd/pcloudcc/control_tools.cpp
index 245ed82..db41838 100644
--- a/cmd/pcloudcc/control_tools.cpp
+++ b/cmd/pcloudcc/control_tools.cpp
@@ -88,7 +88,7 @@ int stop_crypto() {
 
 int finalize() {
   int ret;
-  char *errm;
+  char *errm = (char *)calloc(MAX_STRING_SIZE , sizeof(char));
 
   if (SendCall(FINALIZE, "", &ret, &errm)) {
     std::cout << "Finalize failed. return is " << ret << " and message is "
diff --git a/cmd/pcloudcc/control_tools.h b/cmd/pcloudcc/control_tools.h
index 73404c7..20bae3a 100644
--- a/cmd/pcloudcc/control_tools.h
+++ b/cmd/pcloudcc/control_tools.h
@@ -29,6 +29,7 @@
 #ifndef CONTROL_TOOLS_H
 #define CONTROL_TOOLS_H
 
+#define MAX_STRING_SIZE 1024
 namespace control_tools {
 
 int start_crypto(const char *pass);