diff --git a/src/extras.cpp b/src/extras.cpp
index ea942f10..9f9a6e3f 100644
--- a/src/extras.cpp
+++ b/src/extras.cpp
@@ -1648,6 +1648,7 @@ void MakeWordFreqList()
 		free(p);
 	}
 	fclose(f_out);
+	free(w_list);
 
 }  // end of Make WorkFreqList