2 files changed, 10 insertions, 0 deletions
diff --git a/ChangeLog b/ChangeLog
index fddec25798..3ce29abdd7 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,9 @@
+Mon Jul 11 23:50:39 2011  Yutaka Kanemoto  <kanemoto@ruby-lang.org>
+
+	* time.c: can't compile time.c on AIX due to missing declaration for
+	  ffs(). It is declared in strings.h on AIX. backported r32518 from
+	  trunk.
+
 Mon Jul 11 23:47:00 2011  Yutaka Kanemoto  <kanemoto@ruby-lang.org>
 
 	* thread_pthread.c (get_stack):  need to adjust stack addr for
diff --git a/time.c b/time.c
index 5dbf9b22ca..95bdb1f504 100644
--- a/time.c
+++ b/time.c
@@ -23,6 +23,10 @@
 #include <float.h>
 #include <math.h>
 
+#ifdef HAVE_STRINGS_H
+#include <strings.h>
+#endif
+
 #include "timev.h"
 
 static ID id_divmod, id_mul, id_submicro, id_nano_num, id_nano_den, id_offset;