diff --git a/src/libstrongswan/settings/settings_parser.y b/src/libstrongswan/settings/settings_parser.y
index a231d959c..ce67a8c5b 100644
--- a/src/libstrongswan/settings/settings_parser.y
+++ b/src/libstrongswan/settings/settings_parser.y
@@ -193,6 +193,8 @@ value:
 		}
 		free($1);
 		free($2);
+		/* suppress compiler warning */
+		(void)yynerrs;
 	}
 	;
 
diff --git a/src/starter/parser/parser.y b/src/starter/parser/parser.y
index 654632bc1..e1188babc 100644
--- a/src/starter/parser/parser.y
+++ b/src/starter/parser/parser.y
@@ -201,6 +201,8 @@ value:
 		}
 		free($1);
 		free($2);
+		/* suppress compiler warning */
+		(void)yynerrs;
 	}
 	;