diff --git a/src/lephisto.h b/src/lephisto.h
index 42cd41e..f6004d8 100644
--- a/src/lephisto.h
+++ b/src/lephisto.h
@@ -31,7 +31,7 @@ extern char dataname[DATA_NAME_LEN];    /**< Datafile name. */
 
 /* Max filename path. */
 #ifndef PATH_MAX
-#  define PATH_MAX 128                  /**< If not already defined. */
+#  define PATH_MAX 256                  /**< If not already defined. */
 #endif
 
 #ifndef M_PI