diff --git a/dll/win32/msvcrt/msvcrt.spec b/dll/win32/msvcrt/msvcrt.spec
index 14f71694065..fa899b546ae 100644
--- a/dll/win32/msvcrt/msvcrt.spec
+++ b/dll/win32/msvcrt/msvcrt.spec
@@ -599,7 +599,6 @@
 @ cdecl _makepath(ptr str str str str)
 @ cdecl _makepath_s(ptr long str str str str)
 # stub _malloc_dbg
-@ cdecl _matherr(ptr)
 @ cdecl _mbbtombc(long)
 # stub _mbbtombc_l
 @ cdecl _mbbtype(long long)
diff --git a/lib/3rdparty/mingw/merr.c b/lib/3rdparty/mingw/merr.c
index d2a55fd9591..0500021cd14 100644
--- a/lib/3rdparty/mingw/merr.c
+++ b/lib/3rdparty/mingw/merr.c
@@ -10,7 +10,6 @@
 
 int __defaultmatherr = 0;
 
-#if 0
 int __CRTDECL
 _matherr (struct _exception *pexcept)
 {
@@ -51,5 +50,3 @@ _matherr (struct _exception *pexcept)
 	  type, pexcept->name, pexcept->arg1, pexcept->arg2, pexcept->retval);
   return 0;
 }
-
-#endif