diff --git a/mingw-w64-crt/Makefile.am b/mingw-w64-crt/Makefile.am
index e02f03e..b705b86 100644
--- a/mingw-w64-crt/Makefile.am
+++ b/mingw-w64-crt/Makefile.am
@@ -324,7 +324,10 @@
   misc/__sys_errlist.c \
   misc/__sys_nerr.c \
   misc/_aligned_msize.c \
+  misc/_aligned_offset_recalloc.c \
+  misc/_aligned_recalloc.c \
   misc/_configthreadlocale.c \
+  misc/_recalloc.c \
   misc/_set_purecall_handler.c \
   misc/imaxdiv.c \
   misc/invalid_parameter_handler.c \
@@ -813,9 +816,12 @@
   misc/__sys_errlist.c \
   misc/__sys_nerr.c \
   misc/_aligned_msize.c \
+  misc/_aligned_offset_recalloc.c \
+  misc/_aligned_recalloc.c \
   misc/_configthreadlocale.c \
   misc/_get_errno.c \
   misc/_initterm_e.c \
+  misc/_recalloc.c \
   misc/_set_errno.c \
   misc/btowc.c \
   misc/imaxabs.c \
diff --git a/mingw-w64-crt/misc/_aligned_offset_recalloc.c b/mingw-w64-crt/misc/_aligned_offset_recalloc.c
new file mode 100644
index 0000000..297393a
--- /dev/null
+++ b/mingw-w64-crt/misc/_aligned_offset_recalloc.c
@@ -0,0 +1,25 @@
+/**
+ * This file has no copyright assigned and is placed in the Public Domain.
+ * This file is part of the mingw-w64 runtime package.
+ * No warranty is given; refer to the file DISCLAIMER.PD within this package.
+ */
+
+#include <malloc.h>
+#include <string.h>
+
+void * __cdecl _aligned_offset_recalloc(void *memory, size_t count, size_t size, size_t alignment, size_t offset)
+{
+  void *new_memory;
+  size_t previous_size;
+  size_t total_size;
+  if (__builtin_mul_overflow(count, size, &total_size))
+    return NULL;
+  previous_size = memory ? _aligned_msize(memory, alignment, offset) : 0;
+  if (previous_size == (size_t)-1)
+    return NULL;
+  new_memory = _aligned_offset_realloc(memory, total_size, alignment, offset);
+  if (new_memory && previous_size < total_size)
+    memset(new_memory + previous_size, 0, total_size - previous_size);
+  return new_memory;
+}
+void * (__cdecl *__MINGW_IMP_SYMBOL(_aligned_offset_recalloc))(void *, size_t, size_t, size_t, size_t) = _aligned_offset_recalloc;
diff --git a/mingw-w64-crt/misc/_aligned_recalloc.c b/mingw-w64-crt/misc/_aligned_recalloc.c
new file mode 100644
index 0000000..e374d09
--- /dev/null
+++ b/mingw-w64-crt/misc/_aligned_recalloc.c
@@ -0,0 +1,25 @@
+/**
+ * This file has no copyright assigned and is placed in the Public Domain.
+ * This file is part of the mingw-w64 runtime package.
+ * No warranty is given; refer to the file DISCLAIMER.PD within this package.
+ */
+
+#include <malloc.h>
+#include <string.h>
+
+void * __cdecl _aligned_recalloc(void *memory, size_t count, size_t size, size_t alignment)
+{
+  void *new_memory;
+  size_t previous_size;
+  size_t total_size;
+  if (__builtin_mul_overflow(count, size, &total_size))
+    return NULL;
+  previous_size = memory ? _aligned_msize(memory, alignment, 0) : 0;
+  if (previous_size == (size_t)-1)
+    return NULL;
+  new_memory = _aligned_realloc(memory, total_size, alignment);
+  if (new_memory && previous_size < total_size)
+    memset(new_memory + previous_size, 0, total_size - previous_size);
+  return new_memory;
+}
+void * (__cdecl *__MINGW_IMP_SYMBOL(_aligned_recalloc))(void *, size_t, size_t, size_t) = _aligned_recalloc;
diff --git a/mingw-w64-crt/misc/_recalloc.c b/mingw-w64-crt/misc/_recalloc.c
new file mode 100644
index 0000000..82d6a11
--- /dev/null
+++ b/mingw-w64-crt/misc/_recalloc.c
@@ -0,0 +1,25 @@
+/**
+ * This file has no copyright assigned and is placed in the Public Domain.
+ * This file is part of the mingw-w64 runtime package.
+ * No warranty is given; refer to the file DISCLAIMER.PD within this package.
+ */
+
+#include <malloc.h>
+#include <string.h>
+
+void * __cdecl _recalloc(void *memory, size_t count, size_t size)
+{
+  void *new_memory;
+  size_t previous_size;
+  size_t total_size;
+  if (__builtin_mul_overflow(count, size, &total_size))
+    return NULL;
+  previous_size = memory ? _msize(memory) : 0;
+  if (previous_size == (size_t)-1)
+    return NULL;
+  new_memory = realloc(memory, total_size);
+  if (new_memory && previous_size < total_size)
+    memset(new_memory + previous_size, 0, total_size - previous_size);
+  return new_memory;
+}
+void * (__cdecl *__MINGW_IMP_SYMBOL(_recalloc))(void *, size_t, size_t) = _recalloc;
diff --git a/mingw-w64-headers/crt/crtdbg.h b/mingw-w64-headers/crt/crtdbg.h
index b53f19b..37014c4 100644
--- a/mingw-w64-headers/crt/crtdbg.h
+++ b/mingw-w64-headers/crt/crtdbg.h
@@ -161,11 +161,9 @@
 #define _aligned_offset_malloc_dbg(s,a,o,f,l) _aligned_offset_malloc(s,a,o)
 #define _aligned_offset_realloc_dbg(p,s,a,o,f,l) _aligned_offset_realloc(p,s,a,o)
 
-#if __MSVCRT_VERSION__ >= 0x900
 #define _recalloc_dbg(p,c,s,t,f,l) _recalloc(p,c,s)
 #define _aligned_recalloc_dbg(p,c,s,a,f,l) _aligned_realloc(p,c,s,a)
 #define _aligned_offset_recalloc_dbg(p,c,s,a,o,f,l) _aligned_offset_recalloc(p,c,s,a,o)
-#endif
 #define _aligned_msize_dbg(p,a,o) _aligned_msize(p,a,o)
 
 #define _malloca_dbg(s,t,f,l) _malloca(s)
diff --git a/mingw-w64-headers/crt/malloc.h b/mingw-w64-headers/crt/malloc.h
index 70f34dc..48ae0db 100644
--- a/mingw-w64-headers/crt/malloc.h
+++ b/mingw-w64-headers/crt/malloc.h
@@ -102,11 +102,9 @@
   _CRTIMP void *__cdecl _aligned_offset_malloc(size_t _Size,size_t _Alignment,size_t _Offset);
   _CRTIMP void *__cdecl _aligned_realloc(void *_Memory,size_t _Size,size_t _Alignment);
   _CRTIMP void *__cdecl _aligned_offset_realloc(void *_Memory,size_t _Size,size_t _Alignment,size_t _Offset);
-# if __MSVCRT_VERSION__ >= 0x900
   _CRTIMP void *__cdecl _recalloc(void *_Memory,size_t _Count,size_t _Size);
   _CRTIMP void *__cdecl _aligned_recalloc(void *_Memory,size_t _Count,size_t _Size,size_t _Alignment);
   _CRTIMP void *__cdecl _aligned_offset_recalloc(void *_Memory,size_t _Count,size_t _Size,size_t _Alignment,size_t _Offset);
-# endif
   _CRTIMP size_t __cdecl _aligned_msize(void *_Memory,size_t _Alignment,size_t _Offset);
 
 #if defined(_DEBUG) && defined(_CRTDBG_MAP_ALLOC)
diff --git a/mingw-w64-headers/crt/stdlib.h b/mingw-w64-headers/crt/stdlib.h
index 969848d..4829713 100644
--- a/mingw-w64-headers/crt/stdlib.h
+++ b/mingw-w64-headers/crt/stdlib.h
@@ -458,11 +458,9 @@
   _CRTIMP void *__cdecl _aligned_offset_malloc(size_t _Size,size_t _Alignment,size_t _Offset);
   _CRTIMP void *__cdecl _aligned_realloc(void *_Memory,size_t _Size,size_t _Alignment);
   _CRTIMP void *__cdecl _aligned_offset_realloc(void *_Memory,size_t _Size,size_t _Alignment,size_t _Offset);
-# if __MSVCRT_VERSION__ >= 0x900
   _CRTIMP void *__cdecl _recalloc(void *_Memory,size_t _Count,size_t _Size);
   _CRTIMP void *__cdecl _aligned_recalloc(void *_Memory,size_t _Count,size_t _Size,size_t _Alignment);
   _CRTIMP void *__cdecl _aligned_offset_recalloc(void *_Memory,size_t _Count,size_t _Size,size_t _Alignment,size_t _Offset);
-# endif
   _CRTIMP size_t __cdecl _aligned_msize(void *_Memory,size_t _Alignment,size_t _Offset);
 
 #if defined(_DEBUG) && defined(_CRTDBG_MAP_ALLOC)