diff --git a/src/main/java/io/github/opencubicchunks/cubicchunks/core/CubicChunksConfig.java b/src/main/java/io/github/opencubicchunks/cubicchunks/core/CubicChunksConfig.java
index d2492c866..fbda581d1 100644
--- a/src/main/java/io/github/opencubicchunks/cubicchunks/core/CubicChunksConfig.java
+++ b/src/main/java/io/github/opencubicchunks/cubicchunks/core/CubicChunksConfig.java
@@ -251,13 +251,21 @@ public static void sync() {
 
     private static void validateConfigValues() {
         if (!VanillaCompatibilityGeneratorProviderBase.REGISTRY.containsKey(new ResourceLocation(compatibilityGeneratorType))) {
-            CubicChunks.LOGGER.error("Compatibility generator type {} doesn't exist, resetting config to default", compatibilityGeneratorType);
+            CubicChunks.LOGGER.error("CubicChunksConfig: Compatibility generator type {} doesn't exist, resetting config to default", compatibilityGeneratorType);
             compatibilityGeneratorType = VanillaCompatibilityGeneratorProviderBase.DEFAULT.toString();
         }
         if (!storageFormat.isEmpty() && !StorageFormatProviderBase.REGISTRY.containsKey(new ResourceLocation(storageFormat))) {
-            CubicChunks.LOGGER.error("Storage format {} doesn't exist, resetting config to default", storageFormat);
+            CubicChunks.LOGGER.error("CubicChunksConfig: Storage format {} doesn't exist, resetting config to default", storageFormat);
             storageFormat = "";
         }
+        if ((defaultMinHeight & 0xF) != 0) {
+            CubicChunks.LOGGER.error("CubicChunksConfig: defaultMinHeight not a multiple of 16, got {}, setting to {}", defaultMinHeight, defaultMinHeight & ~0xF);
+            defaultMinHeight &= ~0xF;
+        }
+        if ((defaultMaxHeight & 0xF) != 0) {
+            CubicChunks.LOGGER.error("CubicChunksConfig: defaultMaxHeight not a multiple of 16, got {}, setting to {}", defaultMaxHeight, defaultMaxHeight & ~0xF);
+            defaultMaxHeight &= ~0xF;
+        }
     }
 
     private static void initDimensionRanges() {
diff --git a/src/main/java/io/github/opencubicchunks/cubicchunks/core/world/WorldSavedCubicChunksData.java b/src/main/java/io/github/opencubicchunks/cubicchunks/core/world/WorldSavedCubicChunksData.java
index 35026bbde..aec44962e 100644
--- a/src/main/java/io/github/opencubicchunks/cubicchunks/core/world/WorldSavedCubicChunksData.java
+++ b/src/main/java/io/github/opencubicchunks/cubicchunks/core/world/WorldSavedCubicChunksData.java
@@ -55,8 +55,8 @@ public WorldSavedCubicChunksData(String name, boolean isCC, int minHeight, int m
 
     @Override
     public void readFromNBT(NBTTagCompound nbt) {
-        minHeight = nbt.getInteger("minHeight");
-        maxHeight = nbt.getInteger("maxHeight");
+        minHeight = nbt.getInteger("minHeight") & ~0xF; // set 4 least significant bits to zero to ensure they are always multiples of 16
+        maxHeight = nbt.getInteger("maxHeight") & ~0xF;
         isCubicChunks = !nbt.hasKey("isCubicChunks") || nbt.getBoolean("isCubicChunks");
         if(nbt.hasKey("compatibilityGeneratorType"))
             compatibilityGeneratorType = new ResourceLocation(nbt.getString("compatibilityGeneratorType"));