diff --git a/lib/hivex.c b/lib/hivex.c
index 4b9fcf0..374e435 100644
--- a/lib/hivex.c
+++ b/lib/hivex.c
@@ -30,7 +30,11 @@
 #include <unistd.h>
 #include <errno.h>
 #include <iconv.h>
-#include <sys/mman.h>
+#ifndef __MINGW32__
+  #include <sys/mman.h>
+#else
+  #include <windows.h>
+#endif
 #include <sys/stat.h>
 #include <assert.h>
 
@@ -63,6 +67,10 @@ static size_t utf16_string_len_in_bytes_max (const char *str, size_t len);
 struct hive_h {
   char *filename;
   int fd;
+#ifdef __MINGW32__
+  HANDLE winmap;
+#endif
+
   size_t size;
   int msglvl;
   int writable;
@@ -312,9 +320,21 @@ hivex_open (const char *filename, int flags)
   h->size = statbuf.st_size;
 
   if (!h->writable) {
+#ifndef __MINGW32__
     h->addr = mmap (NULL, h->size, PROT_READ, MAP_SHARED, h->fd, 0);
     if (h->addr == MAP_FAILED)
       goto error;
+#else
+    // Mingw / Gnulib does not support mmap, we have to use native win32api
+    // Create file mapping
+    h->winmap = CreateFileMapping ((HANDLE)_get_osfhandle(h->fd), NULL, PAGE_READONLY, 0, 0, NULL);
+    if (h->winmap == NULL)
+      goto error;
+    // Create map view
+    h->addr = MapViewOfFile (h->winmap, FILE_MAP_READ, 0, 0, h->size);
+    if (h->addr == NULL)
+      goto error;
+#endif
 
     if (h->msglvl >= 2)
       fprintf (stderr, "hivex_open: mapped file at %p\n", h->addr);
@@ -532,11 +552,23 @@ hivex_open (const char *filename, int flags)
   int err = errno;
   if (h) {
     free (h->bitmap);
+#ifndef __MINGW32__
     if (h->addr && h->size && h->addr != MAP_FAILED) {
-      if (!h->writable)
+#else
+    if (h->addr && h->size && h->addr != NULL) {
+#endif
+      if (!h->writable) {
+#ifndef __MINGW32__
         munmap (h->addr, h->size);
-      else
+#else
+        UnmapViewOfFile (h->addr);
+#endif
+      } else
         free (h->addr);
+#ifdef __MINGW32__
+      if (!h->writable && h->winmap != NULL)
+        CloseHandle (h->winmap);
+#endif
     }
     if (h->fd >= 0)
       close (h->fd);
@@ -556,9 +588,14 @@ hivex_close (hive_h *h)
     fprintf (stderr, "hivex_close\n");
 
   free (h->bitmap);
-  if (!h->writable)
+  if (!h->writable) {
+#ifndef __MINGW32__
     munmap (h->addr, h->size);
-  else
+#else
+    UnmapViewOfFile (h->addr);
+    CloseHandle (h->winmap);
+#endif
+  } else
     free (h->addr);
   if (h->fd >= 0)
     r = close (h->fd);