diff --git a/spec/lrama/integration_spec.rb b/spec/lrama/integration_spec.rb
index 59c0f8de..aaf20320 100644
--- a/spec/lrama/integration_spec.rb
+++ b/spec/lrama/integration_spec.rb
@@ -116,7 +116,7 @@ def test_rules(rules, input, expected, command_args: [], debug: false)
 
   %%
 
-  program : { (void)yynerrs; }
+  program : /* empty */
        | expr { printf("=> %d", $1); }
        ;
   expr : NUM
@@ -149,7 +149,7 @@ def test_rules(rules, input, expected, command_args: [], debug: false)
 
   %%
 
-  program : { }
+  program : /* empty */
           ;
 
     Grammar
@@ -195,7 +195,7 @@ def test_rules(rules, input, expected, command_args: [], debug: false)
 
   %%
 
-  program : { (void)yynerrs; }
+  program : /* empty */
        | expr { printf("=> %d", $1); }
        ;
   expr : NUM
@@ -290,8 +290,6 @@ def test_rules(rules, input, expected, command_args: [], debug: false)
 
   line: expr
           {
-            (void)yynerrs;
-
             printf("line (%d): ", @expr.first_line);
             print_location(&@expr);
 
@@ -411,7 +409,7 @@ def test_rules(rules, input, expected, command_args: [], debug: false)
 
   %%
 
-  program : { (void)yynerrs; }
+  program : /* empty */
        | expr { printf("=> %d", $1); }
        ;
 
@@ -457,7 +455,7 @@ def test_rules(rules, input, expected, command_args: [], debug: false)
 
   %%
 
-  program : { (void)yynerrs; }
+  program : /* empty */
        | expr { printf("=> %d", $1); }
        ;
   expr : NUM
diff --git a/template/bison/yacc.c b/template/bison/yacc.c
index 184eacb3..0e17b46f 100644
--- a/template/bison/yacc.c
+++ b/template/bison/yacc.c
@@ -1485,6 +1485,7 @@ YYLTYPE yylloc = yyloc_default;
 <%# b4_declare_parser_state_variables -%>
     /* Number of syntax errors so far.  */
     int yynerrs = 0;
+    YY_USE (yynerrs); /* Silence compiler warning.  */
 
     yy_state_fast_t yystate = 0;
     /* Number of tokens to shift before error messages enabled.  */