diff --git a/src/character.cpp b/src/character.cpp
index 6d73d8425569e..ce15253aa915b 100644
--- a/src/character.cpp
+++ b/src/character.cpp
@@ -6828,8 +6828,8 @@ bool Character::invoke_item( item *used, const std::string &method, const tripoi
                                it_name, ammo_req );
         } else if( used->has_flag( flag_USES_BIONIC_POWER ) ) {
             add_msg_if_player( m_info,
-                               n_gettext( "Your %s needs %d bionic power.",
-                                          "Your %s needs %d bionic power.",
+                               n_gettext( "Your %s needs %d kJ of bionic power.",
+                                          "Your %s needs %d kJ of bionic power.",
                                           ammo_req ),
                                it_name, ammo_req );
         } else {