diff --git a/src/main/java/it/cavallium/dbengine/database/disk/LLLocalGroupedReactiveRocksIterator.java b/src/main/java/it/cavallium/dbengine/database/disk/LLLocalGroupedReactiveRocksIterator.java
index 98e357f..944932e 100644
--- a/src/main/java/it/cavallium/dbengine/database/disk/LLLocalGroupedReactiveRocksIterator.java
+++ b/src/main/java/it/cavallium/dbengine/database/disk/LLLocalGroupedReactiveRocksIterator.java
@@ -34,7 +34,9 @@ public abstract class LLLocalGroupedReactiveRocksIterator<T> extends
 			}
 			try {
 				if (obj.readOptions != null) {
-					obj.readOptions.close();
+					if (!(obj.readOptions instanceof UnreleasableReadOptions)) {
+						obj.readOptions.close();
+					}
 				}
 			} catch (Throwable ex) {
 				logger.error("Failed to close readOptions", ex);
diff --git a/src/main/java/it/cavallium/dbengine/database/disk/LLLocalKeyPrefixReactiveRocksIterator.java b/src/main/java/it/cavallium/dbengine/database/disk/LLLocalKeyPrefixReactiveRocksIterator.java
index 5db1b36..ce41e7f 100644
--- a/src/main/java/it/cavallium/dbengine/database/disk/LLLocalKeyPrefixReactiveRocksIterator.java
+++ b/src/main/java/it/cavallium/dbengine/database/disk/LLLocalKeyPrefixReactiveRocksIterator.java
@@ -35,7 +35,9 @@ public class LLLocalKeyPrefixReactiveRocksIterator extends
 			}
 			try {
 				if (obj.readOptions != null) {
-					obj.readOptions.close();
+					if (!(obj.readOptions instanceof UnreleasableReadOptions)) {
+						obj.readOptions.close();
+					}
 				}
 			} catch (Throwable ex) {
 				logger.error("Failed to close readOptions", ex);
diff --git a/src/main/java/it/cavallium/dbengine/database/disk/LLLocalReactiveRocksIterator.java b/src/main/java/it/cavallium/dbengine/database/disk/LLLocalReactiveRocksIterator.java
index 1856e1a..da0d6b4 100644
--- a/src/main/java/it/cavallium/dbengine/database/disk/LLLocalReactiveRocksIterator.java
+++ b/src/main/java/it/cavallium/dbengine/database/disk/LLLocalReactiveRocksIterator.java
@@ -33,7 +33,9 @@ public abstract class LLLocalReactiveRocksIterator<T> extends
 			}
 			try {
 				if (obj.readOptions != null) {
-					obj.readOptions.close();
+					if (!(obj.readOptions instanceof UnreleasableReadOptions)) {
+						obj.readOptions.close();
+					}
 				}
 			} catch (Throwable ex) {
 				logger.error("Failed to close readOptions", ex);