diff --git a/utils/deriveConstants/DeriveConstants.hs b/utils/deriveConstants/DeriveConstants.hs
index 6344569..93d29b9 100644
--- a/utils/deriveConstants/DeriveConstants.hs
+++ b/utils/deriveConstants/DeriveConstants.hs
@@ -711,6 +711,7 @@ getWanted verbose tmpdir gccProgram gccFlags nmProgram
           -- "_derivedConstantMAX_Vanilla_REG C b 0" Mac OS X
           -- "derivedConstantMAX_Vanilla_REG C 0000000b 0000000b" GNU
           -- "derivedConstantMAX_Vanilla_REG D        1        b" Solaris
+          -- "_derivedConstantMAX_Vanilla_REG C 000000b" MinGW
           -- and returns ("MAX_Vanilla_REG", 11)
           parseNmLine xs0 = case words xs0 of
                             [x0, x1, x2, x3] -> case stripPrefix prefix $ dropWhile (== '_') x0 of
@@ -718,6 +719,11 @@ getWanted verbose tmpdir gccProgram gccFlags nmProgram
                                 [(size, "")] -> Just (name, size)
                                 _ -> Nothing
                               _ -> Nothing
+                            [x0, "C", x2] -> case stripPrefix prefix $ dropWhile (== '_') x0 of
+                                               Just name -> case readHex x2 of
+                                                              [(size, "")] -> Just (name, size)
+                                                              _ -> Nothing
+                                               _ -> Nothing
                             _ -> Nothing
 
           -- If an Int value is larger than 2^28 or smaller