diff --git a/ddraw.rc b/ddraw.rc
index 59ee027..93931f9 100644
--- a/ddraw.rc
+++ b/ddraw.rc
@@ -4,7 +4,7 @@
 #define VERSION_MAJOR    1
 #define VERSION_MINOR    3
 #define VERSION_BUILD    0
-#define VERSION_REVISION 0  
+#define VERSION_REVISION 1  
 
 #define VERSION          VERSION_MAJOR, VERSION_MINOR, VERSION_BUILD, VERSION_REVISION
 #define VERSION_STRING   ver_str(VERSION_MAJOR, VERSION_MINOR, VERSION_BUILD, VERSION_REVISION)
diff --git a/src/render_soft.c b/src/render_soft.c
index 3322dcf..e438815 100644
--- a/src/render_soft.c
+++ b/src/render_soft.c
@@ -60,7 +60,9 @@ DWORD WINAPI render_soft_main(void)
             DWORD curTick = timeGetTime();
             if (lastTick + frameLength > curTick)
             {
+                ReleaseSemaphore(ddraw->render.sem, 1, NULL);
                 SetEvent(ddraw->render.ev);
+                SwitchToThread();
                 continue;
             }
             lastTick = curTick;