diff --git a/lib/impure/re.nim b/lib/impure/re.nim
index b2283a8a1fb52..dae0aefb60019 100644
--- a/lib/impure/re.nim
+++ b/lib/impure/re.nim
@@ -219,20 +219,20 @@ proc findBounds*(buf: cstring, pattern: Regex,
   var
     rtarray = initRtArray[cint](3)
     rawMatches = rtarray.getRawData
-    res = pcre.exec(pattern.h, pattern.e, buf, bufSize.cint, start.cint, 0'i32,
+    res = pcre.exec(pattern.h, pattern.e, buf, bufSize.cint, start.cint, flags,
       cast[ptr cint](rawMatches), 3)
   if res < 0'i32: return (-1, 0)
   return (int(rawMatches[0]), int(rawMatches[1]-1))
 
 proc findBounds*(s: string, pattern: Regex,
-                 start = 0): tuple[first, last: int] {.inline.} =
+                 start = 0, flags = int32(0)): tuple[first, last: int] {.inline.} =
   ## returns the `first` and `last` position of `pattern` in `s`.
   ## If it does not match, `(-1,0)` is returned.
   ##
   ## Note: there is a speed improvement if the matches do not need to be captured.
   runnableExamples:
     assert findBounds("01234abc89", re"abc") == (5,7)
-  result = findBounds(cstring(s), pattern, start, s.len)
+  result = findBounds(cstring(s), pattern, start, s.len, flags)
 
 proc matchOrFind(buf: cstring, pattern: Regex, start, bufSize: int, flags: cint): cint =
   var