diff --git a/configure.ac b/configure.ac
index 66d491c5f3623..50cfd0d4190f7 100644
--- a/configure.ac
+++ b/configure.ac
@@ -548,7 +548,6 @@ ctime_r \
 crypt \
 explicit_memset \
 flock \
-fpclass \
 ftok \
 funopen \
 gai_strerror \