diff --git a/src/main/java/de/ellpeck/naturesaura/blocks/tiles/TileEntitySnowCreator.java b/src/main/java/de/ellpeck/naturesaura/blocks/tiles/TileEntitySnowCreator.java
index 124d8ba3..9fe916c5 100644
--- a/src/main/java/de/ellpeck/naturesaura/blocks/tiles/TileEntitySnowCreator.java
+++ b/src/main/java/de/ellpeck/naturesaura/blocks/tiles/TileEntitySnowCreator.java
@@ -52,7 +52,8 @@ public class TileEntitySnowCreator extends TileEntityImpl implements ITickableTi
 
                 Fluid fluid = this.world.getFluidState(down).getFluid();
                 if (fluid == Fluids.WATER) {
-                    this.world.setBlockState(down, Blocks.ICE.getDefaultState());
+                    if (this.world.getBlockState(down).getMaterial().isReplaceable())
+                        this.world.setBlockState(down, Blocks.ICE.getDefaultState());
                 } else if (Blocks.SNOW.getDefaultState().isValidPosition(this.world, pos) && this.world.getBlockState(pos).getBlock() != Blocks.SNOW && this.world.getBlockState(pos).getMaterial().isReplaceable()) {
                     this.world.setBlockState(pos, Blocks.SNOW.getDefaultState());