diff --git a/include/ldap_config.h.in b/include/ldap_config.h.in
index 59b5c673f3..b0167e24b2 100644
--- a/include/ldap_config.h.in
+++ b/include/ldap_config.h.in
@@ -28,9 +28,13 @@
 
 /* directory for temporary files */
 #if defined( _P_tmpdir )
-#define LDAP_TMPDIR _P_tmpdir
+# define LDAP_TMPDIR _P_tmpdir
+#elif defined( P_tmpdir )
+# define LDAP_TMPDIR P_tmpdir
+#elif defined( _PATH_TMPDIR )
+# define LDAP_TMPDIR _PATH_TMPDIR
 #else
-#define LDAP_TMPDIR LDAP_DIRSEP "tmp"
+# define LDAP_TMPDIR LDAP_DIRSEP "tmp"
 #endif
 
 /* directories */