diff -ur slang.old/src/slcurses.c slang/src/slcurses.c
--- slang.old/src/slcurses.c    Fri Apr 24 09:16:46 1998
+++ slang/src/slcurses.c        Sat Jul  4 07:30:31 1998
@@ -134,7 +134,10 @@
                }
              else if (ch == 0xFFFF) return ERR;
              SLang_ungetkey (ch);
-             return SLkp_getkey ();
+             if ((ch = SLkp_getkey ()) != SL_KEY_ERR)
+               return ch;
+             else
+               return SLang_getkey ();
           }
         return SLang_getkey ();
      }
diff -ur slang.old/src/slkeymap.c slang/src/slkeymap.c
--- slang.old/src/slkeymap.c    Fri Apr 24 09:16:47 1998
+++ slang/src/slkeymap.c        Sat Jul  4 07:41:42 1998
@@ -343,6 +343,8 @@

 SLang_Key_Type *SLang_do_key(SLKeyMap_List_Type *kml, int (*getkey)(void))
 {
+   unsigned char SLang_Undo_Buffer [SL_MAX_INPUT_BUFFER_LEN];
+   int SLang_Undo_Len = 0;
    register SLang_Key_Type *key, *next, *kmax;
    unsigned int len;
    unsigned char input_ch;
@@ -356,6 +358,7 @@
      return NULL;

    input_ch = (unsigned char) SLang_Last_Key_Char;
+   SLang_Undo_Buffer [SLang_Undo_Len++] = input_ch;

    key = (SLang_Key_Type *) &((kml->keymap)[input_ch]);

@@ -372,7 +375,11 @@

         key = kml->keymap + input_ch;
         if (key->type == 0)
+        {
+          if (getkey == (int (*)(void)) SLang_getkey)
+            SLang_ungetkey_string (SLang_Undo_Buffer, SLang_Undo_Len);
           return NULL;
+        }
      }

    /* It appears to be a prefix character in a key sequence. */
@@ -385,6 +392,7 @@
      {
         SLang_Key_TimeOut_Flag = 1;
         SLang_Last_Key_Char = (*getkey)();
+        SLang_Undo_Buffer [SLang_Undo_Len++] = (unsigned char) SLang_Last_Key_Char;
         SLang_Key_TimeOut_Flag = 0;

         len++;
@@ -458,6 +466,8 @@
         kmax = next;
      }

+   if (getkey == (int (*)(void)) SLang_getkey)
+     SLang_ungetkey_string (SLang_Undo_Buffer, SLang_Undo_Len);
    return NULL;
 }

diff -ur slang.old/src/slkeypad.c slang/src/slkeypad.c
--- slang.old/src/slkeypad.c    Fri Apr 24 09:16:47 1998
+++ slang/src/slkeypad.c        Sat Jul  4 07:30:31 1998
@@ -110,7 +110,7 @@
    key = SLang_do_key (Keymap_List, (int (*)(void)) SLang_getkey);
    if ((key == NULL) || (key->type != SLKEY_F_KEYSYM))
      {
-        SLang_flush_input ();
+        /* SLang_flush_input (); */
         return SL_KEY_ERR;
      }

