diff --git a/ChangeLog b/ChangeLog
index 1c3308463f..a4d63c76b3 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,8 @@
+Fri Jun 30 20:00:18 2017  Nobuyoshi Nakada  <nobu@ruby-lang.org>
+
+	* dir.c (is_case_sensitive): use getattrlist() if fgetattrlist() is
+	  unavailable, on OSX 10.5. [Bug #11054]
+
 Fri Jun 30 19:58:16 2017  Nobuyoshi Nakada  <nobu@ruby-lang.org>
 
 	* tool/mkconfig.rb (RbConfig): prefix SDKROOT to oldincludedir
diff --git a/dir.c b/dir.c
index 6a63172e85..7376d5df1c 100644
--- a/dir.c
+++ b/dir.c
@@ -1470,8 +1470,13 @@ join_path(const char *path, long len, int dirsep, const char *name, size_t namle
 }
 
 #ifdef HAVE_GETATTRLIST
+# if defined HAVE_FGETATTRLIST
+#   define is_case_sensitive(dirp, path) is_case_sensitive(dirp)
+# else
+#   define is_case_sensitive(dirp, path) is_case_sensitive(path)
+# endif
 static int
-is_case_sensitive(DIR *dirp)
+is_case_sensitive(DIR *dirp, const char *path)
 {
     struct {
 	u_int32_t length;
@@ -1482,8 +1487,13 @@ is_case_sensitive(DIR *dirp)
     const int idx = VOL_CAPABILITIES_FORMAT;
     const uint32_t mask = VOL_CAP_FMT_CASE_SENSITIVE;
 
+#   if defined HAVE_FGETATTRLIST
     if (fgetattrlist(dirfd(dirp), &al, attrbuf, sizeof(attrbuf), FSOPT_NOFOLLOW))
 	return -1;
+#   else
+    if (getattrlist(path, &al, attrbuf, sizeof(attrbuf), FSOPT_NOFOLLOW))
+	return -1;
+#   endif
     if (!(cap->valid[idx] & mask))
 	return -1;
     return (cap->capabilities[idx] & mask) != 0;
@@ -1778,7 +1788,7 @@ glob_helper(
 	}
 # endif
 # ifdef HAVE_GETATTRLIST
-	if (is_case_sensitive(dirp) == 0)
+	if (is_case_sensitive(dirp, path) == 0)
 	    flags |= FNM_CASEFOLD;
 # endif
 	while ((dp = READDIR(dirp, enc)) != NULL) {
diff --git a/version.h b/version.h
index bb57cf7181..91cc6cb3fc 100644
--- a/version.h
+++ b/version.h
@@ -1,6 +1,6 @@
 #define RUBY_VERSION "2.3.5"
 #define RUBY_RELEASE_DATE "2017-06-30"
-#define RUBY_PATCHLEVEL 319
+#define RUBY_PATCHLEVEL 320
 
 #define RUBY_RELEASE_YEAR 2017
 #define RUBY_RELEASE_MONTH 6