diff --git a/libecmbind/ecmbind.h b/libecmbind/ecmbind.h
index 641f6e1..0004504 100644
--- a/libecmbind/ecmbind.h
+++ b/libecmbind/ecmbind.h
@@ -27,7 +27,7 @@ typedef struct {
 } dto_servicedescriptor_t;
 
 typedef void (*cb_enum_indeces_t)(int slave, int index);
-typedef void (*cb_enum_sdo_descriptors_t)(int slave, int index, uint16_t dataType, uint16_t objectCode, int sub, ushort bitlength, char *name);
+typedef void (*cb_enum_sdo_descriptors_t)(int slave, int index, uint16_t dataType, uint16_t objectCode, int sub, uint16_t bitlength, char *name);
 typedef void (*cb_enum_pdo)(uint16_t slave, uint16_t index, char subindex, int addr_offset, int addr_bit, int bitlength);
 
 extern ecd_pdo_entry_t ecd_pdo_map[1024];