diff --git a/src/bin/pg_waldump/pg_waldump.c b/src/bin/pg_waldump/pg_waldump.c
index a8cf58e35f5..2daed328e7d 100644
--- a/src/bin/pg_waldump/pg_waldump.c
+++ b/src/bin/pg_waldump/pg_waldump.c
@@ -177,7 +177,7 @@ search_directory(const char *directory, const char *fname)
 			if (IsXLogFileName(xlde->d_name))
 			{
 				fd = open_file_in_directory(directory, xlde->d_name);
-				fname = xlde->d_name;
+				fname = pg_strdup(xlde->d_name);
 				break;
 			}
 		}