diff --git a/docs/libssh2_userauth_keyboard_interactive_ex.md b/docs/libssh2_userauth_keyboard_interactive_ex.md
index 87eff43c..709458d6 100644
--- a/docs/libssh2_userauth_keyboard_interactive_ex.md
+++ b/docs/libssh2_userauth_keyboard_interactive_ex.md
@@ -36,11 +36,12 @@ for.
 *username_len* - Length of username parameter.
 
 *response_callback* - As authentication proceeds, the host issues several
-(1 or more) challenges and requires responses. This callback is called at
-this moment. The callback is responsible to obtain responses for the
-challenges, fill the provided data structure and then return
-control. Responses are sent to the host. String values are free(3)ed
-by the library. The callback prototype must match this:
+(1 or more) challenges and requires responses. This callback is called at this
+moment. The callback is responsible to obtain responses for the challenges,
+fill the provided data structure and then return control. Use the custom
+LIBSSH2_ALLOC_FUNC (or, if not set, the default system allocator) to allocate
+memory for the `text` field. Responses are sent to the host. The callback
+prototype must match this:
 
 ~~~c
 void response(const char *name,
diff --git a/include/libssh2.h b/include/libssh2.h
index 267cf3a5..c14e3a56 100644
--- a/include/libssh2.h
+++ b/include/libssh2.h
@@ -218,14 +218,14 @@ typedef off_t libssh2_struct_stat_size;
 #endif
 typedef struct _LIBSSH2_USERAUTH_KBDINT_PROMPT
 {
-    unsigned char *text;  /* FIXME: require LIBSSH2_ALLOC_FUNC */
+    unsigned char *text;
     size_t length;
     unsigned char echo;
 } LIBSSH2_USERAUTH_KBDINT_PROMPT;
 
 typedef struct _LIBSSH2_USERAUTH_KBDINT_RESPONSE
 {
-    char *text;           /* FIXME: require LIBSSH2_ALLOC_FUNC */
+    char *text;
     unsigned int length;  /* FIXME: change type to size_t */
 } LIBSSH2_USERAUTH_KBDINT_RESPONSE;