diff --git a/ChangeLog b/ChangeLog
index 6cec87d..e5802ad 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -10,6 +10,9 @@
 
 2009-02-01  Bruno Haible  <bruno@clisp.org>
 
+	* aclocal.m4 (CL_PROG_INSTALL): Fix detection of broken AIX installbsd
+	program.
+
 	* tests/Makefile.in (clean): Remove *.dSYM directories left over by gcc
 	on MacOS X 10.5.
 
diff --git a/aclocal.m4 b/aclocal.m4
index e834c09..41598df 100644
--- a/aclocal.m4
+++ b/aclocal.m4
@@ -31,7 +31,7 @@ AC_CACHE_VAL(cl_cv_path_install,
 	    :
 	  else
 	    if test $ac_prog = installbsd &&
-	      grep src/bos $ac_dir/$ac_prog >/dev/null 2>&1; then
+	      strings $ac_dir/$ac_prog | grep src/bos >/dev/null 2>&1; then
 	      # AIX installbsd doesn't work without option "-g".
 	      :
 	    else