diff --git a/osal/win32/osal.c b/osal/win32/osal.c
index d744fea7..d9572cad 100644
--- a/osal/win32/osal.c
+++ b/osal/win32/osal.c
@@ -12,9 +12,10 @@ static double qpc2usec;
 
 #define USECS_PER_SEC     1000000
 
-int osal_getrelativetime(struct timeval *tv, struct timezone *tz)
+static int osal_getrelativetime(struct timeval *tv, struct timezone *tz)
 {
    int64_t wintime, usecs;
+   (void)tz;
    if(!sysfrequency)
    {
       timeBeginPeriod(1);
@@ -33,7 +34,7 @@ int osal_gettimeofday(struct timeval *tv, struct timezone *tz)
 {
    FILETIME system_time;
    int64 system_time64, usecs;
-
+   (void)tz;
    /* The offset variable is required to switch from Windows epoch (January 1, 1601) to
     * Unix epoch (January 1, 1970). Number of days between both epochs: 134.774
     *
@@ -130,9 +131,9 @@ void osal_free(void *ptr)
    free(ptr);
 }
 
-int osal_thread_create(void **thandle, int stacksize, void *func, void *param)
+int osal_thread_create(void *thandle, int stacksize, void *func, void *param)
 {
-   *thandle = CreateThread(NULL, stacksize, func, param, 0, NULL);
+   *(OSAL_THREAD_HANDLE*)thandle = CreateThread(NULL, stacksize, func, param, 0, NULL);
    if(!thandle)
    {
       return 0;
@@ -140,13 +141,13 @@ int osal_thread_create(void **thandle, int stacksize, void *func, void *param)
    return 1;
 }
 
-int osal_thread_create_rt(void **thandle, int stacksize, void *func, void *param)
+int osal_thread_create_rt(void *thandle, int stacksize, void *func, void *param)
 {
    int ret;
    ret = osal_thread_create(thandle, stacksize, func, param);
    if (ret)
    {
-      ret = SetThreadPriority(*thandle, THREAD_PRIORITY_TIME_CRITICAL);
+      ret = SetThreadPriority(thandle, THREAD_PRIORITY_TIME_CRITICAL);
    }
    return ret;
 }
diff --git a/osal/win32/osal_win32.h b/osal/win32/osal_win32.h
index b1c87ffc..37a187ad 100644
--- a/osal/win32/osal_win32.h
+++ b/osal/win32/osal_win32.h
@@ -29,6 +29,8 @@
     }                                                                         \
   } while (0)
 
+struct timezone;
+// currently the tz parameter is ignored in the win32 implmentation.
 int osal_gettimeofday (struct timeval *tv, struct timezone *tz);
 
 #endif
diff --git a/oshw/win32/nicdrv.c b/oshw/win32/nicdrv.c
index 9657f31c..96d2f0fb 100644
--- a/oshw/win32/nicdrv.c
+++ b/oshw/win32/nicdrv.c
@@ -89,10 +89,9 @@ static void ecx_clear_rxbufstat(int *rxbufstat)
  */
 int ecx_setupnic(ecx_portt *port, const char *ifname, int secondary)
 {
-   int i, rval;
+   int i;
    pcap_t **psock;
 
-   rval = 0;
    if (secondary)
    {
       /* secondary port struct available? */
diff --git a/oshw/win32/oshw.c b/oshw/win32/oshw.c
index c217baa9..247887ec 100644
--- a/oshw/win32/oshw.c
+++ b/oshw/win32/oshw.c
@@ -35,7 +35,6 @@ uint16 oshw_ntohs (uint16 network)
 ec_adaptert * oshw_find_adapters (void)
 {
    int i = 0;
-   int ret = 0;
    pcap_if_t *alldevs;
    pcap_if_t *d;
    ec_adaptert * adapter;