diff --git a/ChangeLog b/ChangeLog
index 93785756d5..09d9628eb7 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,7 @@
+Sun Apr 24 23:29:16 2016  Rei Odaira  <Rei.Odaira@gmail.com>
+
+	* configure.in: add missing -lm for AIX.
+
 Sun Apr 24 18:33:58 2016  Kazuki Tsujimoto  <kazuki@callcc.net>
 
 	* vm_insnhelper.c (INLINE): disable r54738 if __NO_INLINE__ is defined.
diff --git a/configure.in b/configure.in
index 5d29a08a32..633b49d6bd 100644
--- a/configure.in
+++ b/configure.in
@@ -1231,7 +1231,7 @@ main()
 		ac_cv_func_isinf=yes
 		ac_cv_func_isnan=yes
 		],
-[aix*],[
+[aix*],[	LIBS="-lm $LIBS"
 		ac_cv_func_round=no
 		],
 [nacl], [