diff --git a/src/window.c b/src/window.c
index 79c97d8..6ca288e 100644
--- a/src/window.c
+++ b/src/window.c
@@ -624,6 +624,110 @@
     }
 }
 
+/*
+ * Figure out the address type for ":wnncmd".
+ */
+    void
+get_wincmd_addr_type(arg, eap)
+    char_u	*arg;
+    exarg_T	*eap;
+{
+    switch (*arg)
+    {
+    case 'S':
+    case Ctrl_S:
+    case 's':
+    case Ctrl_N:
+    case 'n':
+    case 'j':
+    case Ctrl_J:
+    case 'k':
+    case Ctrl_K:
+    case 'T':
+    case Ctrl_R:
+    case 'r':
+    case 'R':
+    case 'K':
+    case 'J':
+    case '+':
+    case '-':
+    case Ctrl__:
+    case '_':
+    case '|':
+    case ']':
+    case Ctrl_RSB:
+    case 'g':
+    case Ctrl_G:
+#ifdef FEAT_VERTSPLIT
+    case Ctrl_V:
+    case 'v':
+    case 'h':
+    case Ctrl_H:
+    case 'l':
+    case Ctrl_L:
+    case 'H':
+    case 'L':
+    case '>':
+    case '<':
+#endif
+#if defined(FEAT_QUICKFIX)
+    case '}':
+#endif
+#ifdef FEAT_SEARCHPATH
+    case 'f':
+    case 'F':
+    case Ctrl_F:
+#endif
+#ifdef FEAT_FIND_ID
+    case 'i':
+    case Ctrl_I:
+    case 'd':
+    case Ctrl_D:
+#endif
+		/* window size or any count */
+		eap->addr_type = ADDR_LINES;
+		break;
+
+    case Ctrl_HAT:
+    case '^':
+		/* buffer number */
+		eap->addr_type = ADDR_BUFFERS;
+		break;
+
+    case Ctrl_Q:
+    case 'q':
+    case Ctrl_C:
+    case 'c':
+    case Ctrl_O:
+    case 'o':
+    case Ctrl_W:
+    case 'w':
+    case 'W':
+    case 'x':
+    case Ctrl_X:
+		/* window number */
+		eap->addr_type = ADDR_WINDOWS;
+		break;
+
+#if defined(FEAT_QUICKFIX)
+    case Ctrl_Z:
+    case 'z':
+    case 'P':
+#endif
+    case 't':
+    case Ctrl_T:
+    case 'b':
+    case Ctrl_B:
+    case 'p':
+    case Ctrl_P:
+    case '=':
+    case CAR:
+		/* no count */
+		eap->addr_type = 0;
+		break;
+    }
+}
+
     static void
 cmd_with_count(cmd, bufp, bufsize, Prenum)
     char	*cmd;