diff --git a/src/monocoque/devices/hapticeffect.c b/src/monocoque/devices/hapticeffect.c
index 7a6c44b..ef78e60 100644
--- a/src/monocoque/devices/hapticeffect.c
+++ b/src/monocoque/devices/hapticeffect.c
@@ -255,7 +255,7 @@ double slipeffect(SimData* simdata, int effecttype, int tyre, double threshold,
     {
         return 0;
     }
-    if(simdata->Zvelocity > 1)
+    if(simdata->Zvelocity > 1 || simdata->Zvelocity < 1)
     {
         return 0;
     }
diff --git a/src/monocoque/simulatorapi/simapi b/src/monocoque/simulatorapi/simapi
index 1d8380d..499b92e 160000
--- a/src/monocoque/simulatorapi/simapi
+++ b/src/monocoque/simulatorapi/simapi
@@ -1 +1 @@
-Subproject commit 1d8380d5dc560df81d27faa1f75643e72e705081
+Subproject commit 499b92e85098c1beac9124f0faec818e1ce29b44