diff --git a/src/popupwin.c b/src/popupwin.c
index a957932..a53ae0f 100644
--- a/src/popupwin.c
+++ b/src/popupwin.c
@@ -71,8 +71,9 @@
     else // "col"
 	n = screen_screencol() + 1 + n;
 
-    if (n < 1)
-	n = 1;
+    // Zero means "not set", use -1 instead.
+    if (n == 0)
+	n = -1;
     return n;
 }
 
@@ -222,7 +223,7 @@
 {
     drag_start_row = mouse_row;
     drag_start_col = mouse_col;
-    if (wp->w_wantline == 0)
+    if (wp->w_wantline <= 0)
 	drag_start_wantline = wp->w_winrow + 1;
     else
 	drag_start_wantline = wp->w_wantline;
@@ -1081,7 +1082,9 @@
     int		org_leftoff = wp->w_popup_leftoff;
     int		minwidth;
     int		wantline = wp->w_wantline;  // adjusted for textprop
+    int		use_wantline = wantline != 0;
     int		wantcol = wp->w_wantcol;    // adjusted for textprop
+    int		use_wantcol = wantcol != 0;
 
     wp->w_winrow = 0;
     wp->w_wincol = 0;
@@ -1097,6 +1100,11 @@
     // If no line was specified default to vertical centering.
     if (wantline == 0)
 	center_vert = TRUE;
+    else if (wantline < 0)
+	// If "wantline" is negative it actually means zero.
+	wantline = 0;
+    if (wantcol < 0)
+	wantcol = 0;
 
     if (wp->w_popup_prop_type > 0 && win_valid(wp->w_popup_prop_win))
     {
@@ -1161,7 +1169,7 @@
     }
     else
     {
-	if (wantline > 0 && (wp->w_popup_pos == POPPOS_TOPLEFT
+	if (use_wantline && (wp->w_popup_pos == POPPOS_TOPLEFT
 		|| wp->w_popup_pos == POPPOS_TOPRIGHT))
 	{
 	    wp->w_winrow = wantline - 1;
@@ -1169,7 +1177,7 @@
 		wp->w_winrow = Rows - 1;
 	}
 
-	if (wantcol == 0)
+	if (!use_wantcol)
 	    center_hor = TRUE;
 	else if (wantcol > 0 && (wp->w_popup_pos == POPPOS_TOPLEFT
 		|| wp->w_popup_pos == POPPOS_BOTLEFT))
@@ -1372,8 +1380,8 @@
 	    // bottom aligned: may move down
 	    wp->w_winrow = wantline - (wp->w_height + extra_height);
 	else
-	    // not enough space, make top aligned
-	    wp->w_winrow = wantline + 1;
+	    // Not enough space, make top aligned.
+	    wp->w_winrow = (wantline < 0 ? 0 : wantline) + 1;
     }
     if (wp->w_winrow >= Rows)
 	wp->w_winrow = Rows - 1;
diff --git a/src/testdir/dumps/Test_popupwin_corners.dump b/src/testdir/dumps/Test_popupwin_corners.dump
index eee6601..82188c0 100644
--- a/src/testdir/dumps/Test_popupwin_corners.dump
+++ b/src/testdir/dumps/Test_popupwin_corners.dump
@@ -1,12 +1,12 @@
-|-+0&#ffffff0@59| @14
-|-@1|#|-@20|@|-@34| @14
-|-@1|╔+0#0000001#ffd7ff255|═@7|╗|-+0#0000000#ffffff0@2|╔+0#0000001#ffd7ff255|═@7|╗|-+0#0000000#ffffff0@2|╔+0#0000001#ffd7ff255|═@7|╗|-+0#0000000#ffffff0@2|╔+0#0000001#ffd7ff255|═@7|╗|-+0#0000000#ffffff0@8| @14
-|-@1|║+0#0000001#ffd7ff255| @7|║|-+0#0000000#ffffff0@2|║+0#0000001#ffd7ff255| @7|║|-+0#0000000#ffffff0@2|║+0#0000001#ffd7ff255| @7|║|-+0#0000000#ffffff0@2|║+0#0000001#ffd7ff255| @7|║|-+0#0000000#ffffff0@8| @14
-|-@1|║+0#0000001#ffd7ff255| |f|i|r|s|t| @1|║|-+0#0000000#ffffff0@2|║+0#0000001#ffd7ff255| |F|i|r|s|t| @1|║|-+0#0000000#ffffff0@2|║+0#0000001#ffd7ff255| |f|i|R|S|t| @1|║|-+0#0000000#ffffff0@2|║+0#0000001#ffd7ff255| |F|I|r|s|T| @1|║|-+0#0000000#ffffff0@8| @14
-|-@1|║+0#0000001#ffd7ff255| |s|e|c|o|n|d| |║|-+0#0000000#ffffff0@2|║+0#0000001#ffd7ff255| |S|e|c|o|n|D| |║|-+0#0000000#ffffff0@2|║+0#0000001#ffd7ff255| |s|e|C|O|n|d| |║|-+0#0000000#ffffff0@2|║+0#0000001#ffd7ff255| |S|E|c|o|N|D| |║|-+0#0000000#ffffff0@8| @14
-|-@1|║+0#0000001#ffd7ff255| @7|║|-+0#0000000#ffffff0@2|║+0#0000001#ffd7ff255| @7|║|-+0#0000000#ffffff0@2|║+0#0000001#ffd7ff255| @7|║|-+0#0000000#ffffff0@2|║+0#0000001#ffd7ff255| @7|║|-+0#0000000#ffffff0@8| @14
-|-@1|╚+0#0000001#ffd7ff255|═@7|╝|-+0#0000000#ffffff0@2|╚+0#0000001#ffd7ff255|═@7|╝|-+0#0000000#ffffff0@2|╚+0#0000001#ffd7ff255|═@7|╝|-+0#0000000#ffffff0@2|╚+0#0000001#ffd7ff255|═@7|╝|-+0#0000000#ffffff0@8| @14
-|-@27|%|-@20>&|-@8| @14
+|-+0&#ffffff0@49>*|-@8| @14
+|-@1|#|-@19|@|-@25|╔+0#0000001#ffd7ff255|═@4|╗|-+0#0000000#ffffff0@2| @14
+|-@1|╔+0#0000001#ffd7ff255|═@7|╗|-+0#0000000#ffffff0@1|╔+0#0000001#ffd7ff255|═@7|╗|-+0#0000000#ffffff0@1|╔+0#0000001#ffd7ff255|═@7|╗|-+0#0000000#ffffff0@1|╔+0#0000001#ffd7ff255|═@7|╗|-+0#0000000#ffffff0@1|║+0#0000001#ffd7ff255| @4|║|-+0#0000000#ffffff0@2| @14
+|-@1|║+0#0000001#ffd7ff255| @7|║|-+0#0000000#ffffff0@1|║+0#0000001#ffd7ff255| @7|║|-+0#0000000#ffffff0@1|║+0#0000001#ffd7ff255| @7|║|-+0#0000000#ffffff0@1|║+0#0000001#ffd7ff255| @7|║|-+0#0000000#ffffff0@1|║+0#0000001#ffd7ff255| |o|n|e| |║|-+0#0000000#ffffff0@2| @14
+|-@1|║+0#0000001#ffd7ff255| |f|i|r|s|t| @1|║|-+0#0000000#ffffff0@1|║+0#0000001#ffd7ff255| |F|i|r|s|t| @1|║|-+0#0000000#ffffff0@1|║+0#0000001#ffd7ff255| |f|i|R|S|t| @1|║|-+0#0000000#ffffff0@1|║+0#0000001#ffd7ff255| |F|I|r|s|T| @1|║|-+0#0000000#ffffff0@1|║+0#0000001#ffd7ff255| |t|w|o| |║|-+0#0000000#ffffff0@2| @14
+|-@1|║+0#0000001#ffd7ff255| |s|e|c|o|n|d| |║|-+0#0000000#ffffff0@1|║+0#0000001#ffd7ff255| |S|e|c|o|n|D| |║|-+0#0000000#ffffff0@1|║+0#0000001#ffd7ff255| |s|e|C|O|n|d| |║|-+0#0000000#ffffff0@1|║+0#0000001#ffd7ff255| |S|E|c|o|N|D| |║|-+0#0000000#ffffff0@1|║+0#0000001#ffd7ff255| @4|║|-+0#0000000#ffffff0@2| @14
+|-@1|║+0#0000001#ffd7ff255| @7|║|-+0#0000000#ffffff0@1|║+0#0000001#ffd7ff255| @7|║|-+0#0000000#ffffff0@1|║+0#0000001#ffd7ff255| @7|║|-+0#0000000#ffffff0@1|║+0#0000001#ffd7ff255| @7|║|-+0#0000000#ffffff0@1|╚+0#0000001#ffd7ff255|═@4|╝|-+0#0000000#ffffff0@2| @14
+|-@1|╚+0#0000001#ffd7ff255|═@7|╝|-+0#0000000#ffffff0@1|╚+0#0000001#ffd7ff255|═@7|╝|-+0#0000000#ffffff0@1|╚+0#0000001#ffd7ff255|═@7|╝|-+0#0000000#ffffff0@1|╚+0#0000001#ffd7ff255|═@7|╝|-+0#0000000#ffffff0@11| @14
+|-@25|%|-@19|&|-@11| @14
 |-@59| @14
 |-@59| @14
-@57|9|,|5|1| @9|T|o|p| 
+@57|1|,|5|1| @9|T|o|p| 
diff --git a/src/testdir/test_popupwin.vim b/src/testdir/test_popupwin.vim
index dc382d8..1c5bcb2 100644
--- a/src/testdir/test_popupwin.vim
+++ b/src/testdir/test_popupwin.vim
@@ -278,7 +278,7 @@
 	      \ border: [],
 	      \ padding: [],
 	      \ })
-	normal 25|r@
+	normal 24|r@
 	let winid1 = popup_create(['First', 'SeconD'], #{
 	      \ line: 'cursor+1',
 	      \ col: 'cursor',
@@ -286,7 +286,7 @@
 	      \ border: [],
 	      \ padding: [],
 	      \ })
-	normal 9G29|r%
+	normal 9G27|r%
 	let winid1 = popup_create(['fiRSt', 'seCOnd'], #{
 	      \ line: 'cursor-1',
 	      \ col: 'cursor',
@@ -294,7 +294,7 @@
 	      \ border: [],
 	      \ padding: [],
 	      \ })
-	normal 51|r&
+	normal 48|r&
 	let winid1 = popup_create(['FIrsT', 'SEcoND'], #{
 	      \ line: 'cursor-1',
 	      \ col: 'cursor',
@@ -302,6 +302,14 @@
 	      \ border: [],
 	      \ padding: [],
 	      \ })
+	normal 1G51|r*
+	let winid1 = popup_create(['one', 'two'], #{
+	      \ line: 'cursor-1',
+	      \ col: 'cursor',
+	      \ pos: 'botleft',
+	      \ border: [],
+	      \ padding: [],
+	      \ })
   END
   call writefile(lines, 'XtestPopupCorners')
   let buf = RunVimInTerminal('-S XtestPopupCorners', #{rows: 12})
diff --git a/src/version.c b/src/version.c
index 728fa47..0347a68 100644
--- a/src/version.c
+++ b/src/version.c
@@ -742,6 +742,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    2210,
+/**/
     2209,
 /**/
     2208,