diff --git a/src/kernel/config.c b/src/kernel/config.c
index 80e949215..f33303ead 100644
--- a/src/kernel/config.c
+++ b/src/kernel/config.c
@@ -599,13 +599,6 @@ void kernel_done(void)
     translation_done();
 }
 
-#ifndef HAVE_STRDUP
-char *_strdup(const char *s)
-{
-    return strcpy((char *)malloc(sizeof(char) * (strlen(s) + 1)), s);
-}
-#endif
-
 bool rule_stealth_other(void)
 {
     static int rule, config;
diff --git a/src/platform.h b/src/platform.h
index 9f4fca3db..722ab0b5c 100644
--- a/src/platform.h
+++ b/src/platform.h
@@ -27,6 +27,9 @@ OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 #define USE_AUTOCONF
 
 #ifdef _MSC_VER
+# define HAVE_STDBOOL_H
+# define HAVE_DIRECT__MKDIR
+# define HAVE__ACCESS
 # define VC_EXTRALEAN
 # define WIN32_LEAN_AND_MEAN
 #pragma warning(push)
@@ -129,7 +132,7 @@ OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 #if defined(HAVE_STDBOOL_H)
 # include <stdbool.h>
 #else
-# if ! HAVE__BOOL
+# ifndef HAVE__BOOL
 #  ifdef __cplusplus
 typedef bool _Bool;
 #  else
diff --git a/storage b/storage
index 2117191d4..18cc3bb8f 160000
--- a/storage
+++ b/storage
@@ -1 +1 @@
-Subproject commit 2117191d4ad75e1eb14809878bc71d15b20a5d86
+Subproject commit 18cc3bb8f8906237915eb31c9899f95340318087