diff --git a/src/auth/pool_passwd.c b/src/auth/pool_passwd.c
index fd7dfe9..15b9282 100644
--- a/src/auth/pool_passwd.c
+++ b/src/auth/pool_passwd.c
@@ -464,7 +464,7 @@ get_pgpool_config_user_password(char *username, char *password_in_config)
 	PasswordMapping *password_mapping = NULL;
 
 	/*
-	 * if the password specified in confg is empty strin or NULL look for the
+	 * if the password specified in config is empty strin or NULL look for the
 	 * password in pool_passwd file
 	 */
 	if (password_in_config == NULL || strlen(password_in_config) == 0)
diff --git a/src/config/pool_config_variables.c b/src/config/pool_config_variables.c
index 66998cc..e8cd4df 100644
--- a/src/config/pool_config_variables.c
+++ b/src/config/pool_config_variables.c
@@ -171,7 +171,7 @@ static void convert_int_from_base_unit(int64 base_value, int base_unit,
 
 
 /* These functions are used to provide Hints for enum type config parameters and
- * to output the vslues of the parameters.
+ * to output the values of the parameters.
  * These functuons are not available for tools since they use the stringInfo that is
  * not present for tools.
  */
diff --git a/src/context/pool_session_context.c b/src/context/pool_session_context.c
index 24b8308..f364dca 100644
--- a/src/context/pool_session_context.c
+++ b/src/context/pool_session_context.c
@@ -261,7 +261,7 @@ pool_unset_query_in_progress(void)
 
 	s->in_progress = false;
 
-	/* Restore where_to_send map if neccessary */
+	/* Restore where_to_send map if necessary */
 	if (s->need_to_restore_where_to_send)
 	{
 		memcpy(s->query_context->where_to_send, s->where_to_send_save, sizeof(s->where_to_send_save));
diff --git a/src/watchdog/wd_json_data.c b/src/watchdog/wd_json_data.c
index faff82e..a7576e1 100644
--- a/src/watchdog/wd_json_data.c
+++ b/src/watchdog/wd_json_data.c
@@ -243,7 +243,7 @@ get_pool_config_json(void)
 	return json_str;
 }
 
-/* The function returs the simple JSON string that contains
+/* The function returns the simple JSON string that contains
  * only one KEY,VALUE along with the authkey key value if provided
  */
 char *
diff --git a/src/watchdog/wd_lifecheck.c b/src/watchdog/wd_lifecheck.c
index 71f4374..ad6f920 100644
--- a/src/watchdog/wd_lifecheck.c
+++ b/src/watchdog/wd_lifecheck.c
@@ -54,7 +54,7 @@
 											 * lifecheck process should waits
 											 * before giving up while fetching
 											 * the configured watchdog node
-											 * infromation from watchdog
+											 * information from watchdog
 											 * process through IPC channel */
 
 /*