diff --git a/soes/esc_foe.h b/soes/esc_foe.h
index 3ca0c5e..b4a9796 100644
--- a/soes/esc_foe.h
+++ b/soes/esc_foe.h
@@ -14,7 +14,7 @@
 #include <cc.h>
 
 /** Maximum number of characters allowed in a file name. */
-#define FOE_FN_MAX      15
+#define FOE_FN_MAX      31
 
 typedef struct foe_writefile_cfg foe_writefile_cfg_t;
 struct foe_writefile_cfg