1 files changed, 2 insertions, 0 deletions
diff --git a/src/constexp.l b/src/constexp.l
index e3ff3f1..8a7db04 100644
--- a/src/constexp.l
+++ b/src/constexp.l
@@ -16,6 +16,8 @@
  *
  */
 %option never-interactive
+%option prefix="constexpYY"
+
 %{
 
 #include "constexp.h"