diff --git "a/win32ss/user/rtl/text.c" "b/win32ss/user/rtl/text.c"
index ac12626796b..8935d1cf48d 100644
--- "a/win32ss/user/rtl/text.c"
+++ "b/win32ss/user/rtl/text.c"
@@ -669,6 +669,7 @@ static const WCHAR *TEXT_NextLineW( HDC hdc, const WCHAR *str, int *count,
                                  int tabwidth, int *pprefix_offset,
                                  ellipsis_data *pellip)
 {
+    /* This is mostly from Wine's dll/user32/text.c's TEXT_NextLineW function */
     int i = 0, j = 0;
     int plen = 0;
     SIZE size = {0, 0};
@@ -765,7 +766,8 @@ static const WCHAR *TEXT_NextLineW( HDC hdc, const WCHAR *str, int *count,
          * several bugs in the Microsoft versions).
          */
         word_broken = 0;
-        line_fits = (num_fit >= j_in_seg);
+        /* CORE-15678 - "+ 1" allows num_fit a bit more room for ReactOS */
+        line_fits = (num_fit + 1 >= j_in_seg);
         if (!line_fits && (format & DT_WORDBREAK))
         {
             const WCHAR *s;