diff --git a/m68k-semi.c b/m68k-semi.c
index d16bc671c6..0371089b98 100644
--- a/m68k-semi.c
+++ b/m68k-semi.c
@@ -33,10 +33,10 @@
 #define SEMIHOSTING_HEAP_SIZE (128 * 1024 * 1024)
 #else
 #include "qemu-common.h"
-#include "sysemu.h"
 #include "gdbstub.h"
 #include "softmmu-semi.h"
 #endif
+#include "sysemu.h"
 
 #define HOSTED_EXIT  0
 #define HOSTED_INIT_SIM 1
diff --git a/osdep.c b/osdep.c
index cb12e5f892..b1664ac9d7 100644
--- a/osdep.c
+++ b/osdep.c
@@ -111,37 +111,6 @@ int qemu_create_pidfile(const char *filename)
     return 0;
 }
 
-#ifdef _WIN32
-
-/* mingw32 needs ffs for compilations without optimization. */
-int ffs(int i)
-{
-    /* Use gcc's builtin ffs. */
-    return __builtin_ffs(i);
-}
-
-/* Offset between 1/1/1601 and 1/1/1970 in 100 nanosec units */
-#define _W32_FT_OFFSET (116444736000000000ULL)
-
-int qemu_gettimeofday(qemu_timeval *tp)
-{
-  union {
-    unsigned long long ns100; /*time since 1 Jan 1601 in 100ns units */
-    FILETIME ft;
-  }  _now;
-
-  if(tp)
-    {
-      GetSystemTimeAsFileTime (&_now.ft);
-      tp->tv_usec=(long)((_now.ns100 / 10ULL) % 1000000ULL );
-      tp->tv_sec= (long)((_now.ns100 - _W32_FT_OFFSET) / 10000000ULL);
-    }
-  /* Always return 0 as per Open Group Base Specifications Issue 6.
-     Do not set errno on error.  */
-  return 0;
-}
-#endif /* _WIN32 */
-
 
 /*
  * Opens a file with FD_CLOEXEC set
diff --git a/osdep.h b/osdep.h
index 671628114a..8bd30d764d 100644
--- a/osdep.h
+++ b/osdep.h
@@ -127,19 +127,4 @@ int qemu_madvise(void *addr, size_t len, int advice);
 
 int qemu_create_pidfile(const char *filename);
 
-#ifdef _WIN32
-int ffs(int i);
-
-int setenv(const char *name, const char *value, int overwrite);
-
-typedef struct {
-    long tv_sec;
-    long tv_usec;
-} qemu_timeval;
-int qemu_gettimeofday(qemu_timeval *tp);
-#else
-typedef struct timeval qemu_timeval;
-#define qemu_gettimeofday(tp) gettimeofday(tp, NULL);
-#endif /* !_WIN32 */
-
 #endif
diff --git a/oslib-win32.c b/oslib-win32.c
index 1ddd857942..e03c47294d 100644
--- a/oslib-win32.c
+++ b/oslib-win32.c
@@ -92,3 +92,30 @@ int inet_aton(const char *cp, struct in_addr *ia)
 void qemu_set_cloexec(int fd)
 {
 }
+
+/* mingw32 needs ffs for compilations without optimization. */
+int ffs(int i)
+{
+    /* Use gcc's builtin ffs. */
+    return __builtin_ffs(i);
+}
+
+/* Offset between 1/1/1601 and 1/1/1970 in 100 nanosec units */
+#define _W32_FT_OFFSET (116444736000000000ULL)
+
+int qemu_gettimeofday(qemu_timeval *tp)
+{
+  union {
+    unsigned long long ns100; /*time since 1 Jan 1601 in 100ns units */
+    FILETIME ft;
+  }  _now;
+
+  if(tp) {
+      GetSystemTimeAsFileTime (&_now.ft);
+      tp->tv_usec=(long)((_now.ns100 / 10ULL) % 1000000ULL );
+      tp->tv_sec= (long)((_now.ns100 - _W32_FT_OFFSET) / 10000000ULL);
+  }
+  /* Always return 0 as per Open Group Base Specifications Issue 6.
+     Do not set errno on error.  */
+  return 0;
+}
diff --git a/posix-aio-compat.c b/posix-aio-compat.c
index 7b862b5400..fa5494db8c 100644
--- a/posix-aio-compat.c
+++ b/posix-aio-compat.c
@@ -24,6 +24,7 @@
 
 #include "qemu-queue.h"
 #include "osdep.h"
+#include "sysemu.h"
 #include "qemu-common.h"
 #include "trace.h"
 #include "block_int.h"
diff --git a/qemu-common.h b/qemu-common.h
index 3496e4f5bb..5555226f0a 100644
--- a/qemu-common.h
+++ b/qemu-common.h
@@ -170,6 +170,11 @@ const char *path(const char *pathname);
 #define qemu_isascii(c)		isascii((unsigned char)(c))
 #define qemu_toascii(c)		toascii((unsigned char)(c))
 
+#ifdef _WIN32
+/* ffs() in oslib-win32.c for WIN32, strings.h for the rest of the world */
+int ffs(int i);
+#endif
+
 void *qemu_malloc(size_t size);
 void *qemu_realloc(void *ptr, size_t size);
 void *qemu_mallocz(size_t size);
diff --git a/qemu-img.c b/qemu-img.c
index 2864cb8204..fa77ac0dbe 100644
--- a/qemu-img.c
+++ b/qemu-img.c
@@ -24,6 +24,7 @@
 #include "qemu-common.h"
 #include "qemu-option.h"
 #include "osdep.h"
+#include "sysemu.h"
 #include "block_int.h"
 #include <stdio.h>
 
diff --git a/qemu-os-posix.h b/qemu-os-posix.h
index ed5c058bc3..353f87813f 100644
--- a/qemu-os-posix.h
+++ b/qemu-os-posix.h
@@ -36,4 +36,7 @@ void os_setup_signal_handling(void);
 void os_daemonize(void);
 void os_setup_post(void);
 
+typedef struct timeval qemu_timeval;
+#define qemu_gettimeofday(tp) gettimeofday(tp, NULL)
+
 #endif
diff --git a/qemu-os-win32.h b/qemu-os-win32.h
index c63778d2fc..1a07e5e264 100644
--- a/qemu-os-win32.h
+++ b/qemu-os-win32.h
@@ -52,4 +52,12 @@ static inline void os_set_proc_name(const char *dummy) {}
 # define EPROTONOSUPPORT EINVAL
 #endif
 
+int setenv(const char *name, const char *value, int overwrite);
+
+typedef struct {
+    long tv_sec;
+    long tv_usec;
+} qemu_timeval;
+int qemu_gettimeofday(qemu_timeval *tp);
+
 #endif
diff --git a/qemu-tool.c b/qemu-tool.c
index 9ccca655ef..392e1c9505 100644
--- a/qemu-tool.c
+++ b/qemu-tool.c
@@ -15,6 +15,7 @@
 #include "monitor.h"
 #include "qemu-timer.h"
 #include "qemu-log.h"
+#include "sysemu.h"
 
 #include <sys/time.h>