diff --git a/src/bgw/scheduler.c b/src/bgw/scheduler.c
index 6cbfa2c345e..e2958498c14 100644
--- a/src/bgw/scheduler.c
+++ b/src/bgw/scheduler.c
@@ -127,7 +127,7 @@ ts_bgw_start_worker(const char *name, const BgwParams *bgw_params)
 
 	strlcpy(worker.bgw_name, name, BGW_MAXLEN);
 	strlcpy(worker.bgw_library_name, ts_extension_get_so_name(), BGW_MAXLEN);
-	strlcpy(worker.bgw_function_name, bgw_params->bgw_main, sizeof(worker.bgw_function_name));
+	strlcpy(worker.bgw_function_name, bgw_params->bgw_main, BGW_MAXLEN);
 
 	memcpy(worker.bgw_extra, bgw_params, sizeof(*bgw_params));
 
diff --git a/src/bgw/worker.h b/src/bgw/worker.h
index 6a6f902a802..48b9abe9226 100644
--- a/src/bgw/worker.h
+++ b/src/bgw/worker.h
@@ -40,7 +40,7 @@ typedef struct BgwParams
 	int32 ttl;
 
 	/** Name of function to call when starting the background worker. */
-	char bgw_main[NAMEDATALEN];
+	char bgw_main[BGW_MAXLEN];
 } BgwParams;
 
 /**