diff --git a/src/Blocks/BlockIce.h b/src/Blocks/BlockIce.h
index 8ff6415fb..76b48d04f 100644
--- a/src/Blocks/BlockIce.h
+++ b/src/Blocks/BlockIce.h
@@ -85,6 +85,7 @@ private:
 		const cEntity * a_Digger
 	) const override
 	{
+		UNUSED(a_Digger);
 		// If there's a solid block or a liquid underneath, convert to water, rather than air
 		if (a_BlockPos.y <= 0)
 		{
diff --git a/src/Blocks/BlockMobSpawner.h b/src/Blocks/BlockMobSpawner.h
index 27d3d61de..791a71301 100644
--- a/src/Blocks/BlockMobSpawner.h
+++ b/src/Blocks/BlockMobSpawner.h
@@ -61,6 +61,10 @@ private:
 		const cEntity * a_Digger
 	) const override
 	{
+		if (a_Digger == nullptr)
+		{
+			return;
+		}
 		if (!a_Digger->IsPlayer())
 		{
 			return;
diff --git a/src/Blocks/BlockOre.h b/src/Blocks/BlockOre.h
index 6d6c2a097..db4f4aea4 100644
--- a/src/Blocks/BlockOre.h
+++ b/src/Blocks/BlockOre.h
@@ -71,6 +71,10 @@ private:
 		const cEntity * a_Digger
 	) const override
 	{
+		if (a_Digger == nullptr)
+		{
+			return;
+		}
 		if (!a_Digger->IsPlayer())
 		{
 			return;