diff --git a/CHANGELOG.md b/CHANGELOG.md
index 4ac01c00ff..6c36ce3eba 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -112,6 +112,7 @@
     Bug #5899: Visible modal windows and dropdowns crashing game on exit
     Bug #5902: NiZBufferProperty is unable to disable the depth test
     Bug #5906: Sunglare doesn't work with Mesa drivers and AMD GPUs
+    Bug #5912: ImprovedBound mod doesn't work
     Feature #390: 3rd person look "over the shoulder"
     Feature #832: OpenMW-CS: Handle deleted references
     Feature #1536: Show more information about level on menu
diff --git a/apps/openmw/mwmechanics/actors.cpp b/apps/openmw/mwmechanics/actors.cpp
index c0a1371585..a1e2d2a726 100644
--- a/apps/openmw/mwmechanics/actors.cpp
+++ b/apps/openmw/mwmechanics/actors.cpp
@@ -346,7 +346,11 @@ namespace MWMechanics
         if (actor != MWMechanics::getPlayer())
             return;
 
-        MWWorld::Ptr newItem = *store.getSlot(slot);
+        MWWorld::Ptr newItem;
+        auto it = store.getSlot(slot);
+        // Equip can fail because beast races cannot equip boots/helmets
+        if(it != store.end())
+            newItem = *it;
 
         if (newItem.isEmpty() || boundPtr != newItem)
             return;
diff --git a/apps/openmw/mwmechanics/summoning.cpp b/apps/openmw/mwmechanics/summoning.cpp
index 0f699ccade..9f65f3d6c9 100644
--- a/apps/openmw/mwmechanics/summoning.cpp
+++ b/apps/openmw/mwmechanics/summoning.cpp
@@ -145,6 +145,12 @@ namespace MWMechanics
 
         for (std::map<ESM::SummonKey, int>::iterator it = creatureMap.begin(); it != creatureMap.end(); )
         {
+            if(it->second == -1)
+            {
+                // Keep the spell effect active if we failed to spawn anything
+                it++;
+                continue;
+            }
             MWWorld::Ptr ptr = MWBase::Environment::get().getWorld()->searchPtrViaActorId(it->second);
             if (ptr.isEmpty() || (ptr.getClass().getCreatureStats(ptr).isDead() && ptr.getClass().getCreatureStats(ptr).isDeathAnimationFinished()))
             {