diff --git a/lib/PgSQL_Data_Stream.cpp b/lib/PgSQL_Data_Stream.cpp
index 84c2ac545..5e3774120 100644
--- a/lib/PgSQL_Data_Stream.cpp
+++ b/lib/PgSQL_Data_Stream.cpp
@@ -256,6 +256,7 @@ PgSQL_Data_Stream::PgSQL_Data_Stream() {
 	encrypted = false;
 	switching_auth_stage = 0;
 	switching_auth_type = 0;
+	tmp_charset = 0;
 	x509_subject_alt_name = NULL;
 	ssl = NULL;
 	rbio_ssl = NULL;
diff --git a/lib/mysql_data_stream.cpp b/lib/mysql_data_stream.cpp
index 06c7bf24b..ebb520dd6 100644
--- a/lib/mysql_data_stream.cpp
+++ b/lib/mysql_data_stream.cpp
@@ -261,6 +261,7 @@ MySQL_Data_Stream::MySQL_Data_Stream() {
 	switching_auth_type = AUTH_UNKNOWN_PLUGIN;
 	switching_auth_sent = AUTH_UNKNOWN_PLUGIN;
 	auth_in_progress = 0;
+	tmp_charset = 0;
 	x509_subject_alt_name=NULL;
 	ssl=NULL;
 	rbio_ssl = NULL;