diff --git a/src/c99-flex.skl b/src/c99-flex.skl
index b7b0d57f..9efbadad 100644
--- a/src/c99-flex.skl
+++ b/src/c99-flex.skl
@@ -2504,8 +2504,6 @@ int yylex_destroy  (yyscan_t yyscanner) {
 
 	/* Pop the buffer stack, destroying each element. */
 	while(yy_current_buffer(yyscanner)) {
-		yy_delete_buffer( yy_current_buffer(yyscanner), yyscanner );
-		yyscanner->yy_buffer_stack[yyscanner->yy_buffer_stack_top] = NULL;
 		yypop_buffer_state(yyscanner);
 	}
 
diff --git a/src/cpp-flex.skl b/src/cpp-flex.skl
index 01e9bf81..9a84d77f 100644
--- a/src/cpp-flex.skl
+++ b/src/cpp-flex.skl
@@ -3827,8 +3827,6 @@ int yylex_destroy  (M4_YY_DEF_ONLY_ARG) {
 
 	/* Pop the buffer stack, destroying each element. */
 	while(yy_current_buffer()) {
-		yy_delete_buffer( yy_current_buffer() M4_YY_CALL_LAST_ARG );
-		YY_CURRENT_BUFFER_LVALUE = NULL;
 		yypop_buffer_state(M4_YY_CALL_ONLY_ARG);
 	}
 
diff --git a/src/go-flex.skl b/src/go-flex.skl
index cf5bed5b..f719e110 100644
--- a/src/go-flex.skl
+++ b/src/go-flex.skl
@@ -2347,8 +2347,6 @@ int yylex_destroy(FlexLexer *yyscanner) {
 
 	/* Pop the buffer stack, destroying each element. */
 	while(yy_current_buffer(yyscanner)) {
-		yy_delete_buffer(yy_current_buffer(yyscanner), yyscanner);
-		yyscanner->yyBufferStack[yyscanner->yyBufferStackTop] = NULL;
 		yypop_buffer_state(yyscanner);
 	}