diff --git a/lib/textsearch.c b/lib/textsearch.c
index 98bcadc..9e2a002 100644
--- a/lib/textsearch.c
+++ b/lib/textsearch.c
@@ -218,7 +218,7 @@
  * Call textsearch_next() to retrieve subsequent matches.
  *
  * Returns the position of first occurrence of the pattern or
- * UINT_MAX if no occurrence was found.
+ * %UINT_MAX if no occurrence was found.
  */ 
 unsigned int textsearch_find_continuous(struct ts_config *conf,
 					struct ts_state *state,