diff --git "a/win32ss/gdi/ntgdi/freetype.c" "b/win32ss/gdi/ntgdi/freetype.c"
index 92070ec1fde..ae4a0ce0921 100644
--- "a/win32ss/gdi/ntgdi/freetype.c"
+++ "b/win32ss/gdi/ntgdi/freetype.c"
@@ -7048,12 +7048,13 @@ IntExtTextOutW(
         glyphSize.cx = realglyph->bitmap.width;
         glyphSize.cy = realglyph->bitmap.rows;
 
-        /* Do chars > space & not DEL & not nbsp have a glyphSize.cx of zero? */
-        if (ch0 > L' ' && ch0 != del && ch0 != nbsp && glyphSize.cx == 0)
-        {
-            DPRINT1("WARNING: family_name '%s' WChar 0x%04x has a glyphSize.cx of zero\n",
-                    face->family_name, ch0);
-        }
+        /* Do chars > space & not DEL & not nbsp have a glyphSize.cx of zero?
+         * HACK: CORE-19872 when handling RTF '\b' for BOLD escape sequence.
+         * Sometimes we get this from riched20. Also, we handle 0x21 for
+         * Control Panel Regional Settings when setting Thai localization. */
+        if (ch0 > L' ' && ch0 != del && ch0 != nbsp && ch0 != 0x62 && ch0 != 0x21 && glyphSize.cx == 0)
+            DPRINT1("WARNING: Font '%s-%s' WChar 0x%04x has a glyphSize.cx of zero\n",
+                     face->family_name, face->style_name, ch0);
 
         /* Don't ignore spaces or non-breaking spaces when computing offset.
          * This completes the fix of CORE-11787. */