diff --git a/include/btchip_context.h b/include/btchip_context.h
index 562fbd65..db9656d3 100644
--- a/include/btchip_context.h
+++ b/include/btchip_context.h
@@ -292,8 +292,8 @@ typedef enum btchip_coin_kind_e {
 } btchip_coin_kind_t;
 
 typedef struct btchip_altcoin_config_s {
-    unsigned short bip44_coin_type;
-    unsigned short bip44_coin_type2;
+    unsigned int bip44_coin_type;
+    unsigned int bip44_coin_type2;
     unsigned short p2pkh_version;
     unsigned short p2sh_version;
     unsigned char family;