diff --git a/forge-1.11.2/src/main/java/org/dynmap/forge_1_11_2/DynmapPlugin.java b/forge-1.11.2/src/main/java/org/dynmap/forge_1_11_2/DynmapPlugin.java
index d444d1a9..ec594357 100644
--- a/forge-1.11.2/src/main/java/org/dynmap/forge_1_11_2/DynmapPlugin.java
+++ b/forge-1.11.2/src/main/java/org/dynmap/forge_1_11_2/DynmapPlugin.java
@@ -177,7 +177,7 @@ public class DynmapPlugin
     		int i = Block.getIdFromBlock(b);
     		if (i >= (stateByID.length >> 4)) {
     			int plen = stateByID.length;
-    			stateByID = Arrays.copyOf(stateByID, i*11/10); // grow array by 10%    			
+    			stateByID = Arrays.copyOf(stateByID, (i*11/10) << 4); // grow array by 10%    			
     			Arrays.fill(stateByID, plen, stateByID.length, DynmapBlockState.AIR);
     		}
             ResourceLocation ui = null;
diff --git a/forge-1.12.2/src/main/java/org/dynmap/forge_1_12_2/DynmapPlugin.java b/forge-1.12.2/src/main/java/org/dynmap/forge_1_12_2/DynmapPlugin.java
index 5e157577..e1955197 100644
--- a/forge-1.12.2/src/main/java/org/dynmap/forge_1_12_2/DynmapPlugin.java
+++ b/forge-1.12.2/src/main/java/org/dynmap/forge_1_12_2/DynmapPlugin.java
@@ -178,7 +178,7 @@ public class DynmapPlugin
     		int i = Block.getIdFromBlock(b);
     		if (i >= (stateByID.length >> 4)) {
     			int plen = stateByID.length;
-    			stateByID = Arrays.copyOf(stateByID, i*11/10); // grow array by 10%    			
+    			stateByID = Arrays.copyOf(stateByID, (i*11/10) << 4); // grow array by 10%    			
     			Arrays.fill(stateByID, plen, stateByID.length, DynmapBlockState.AIR);
     		}
             ResourceLocation ui = null;