1 files changed, 1 insertions, 1 deletions
diff --git a/src/pinky.c b/src/pinky.c
index 5e279e97c..00107b731 100644
--- a/src/pinky.c
+++ b/src/pinky.c
@@ -82,7 +82,7 @@ static struct option const longopts[] =
 
 /* Count and return the number of ampersands in STR.  */
 
-static size_t
+static size_t _GL_ATTRIBUTE_PURE
 count_ampersands (const char *str)
 {
   size_t count = 0;