diff --git a/src/java/org/lwjgl/test/mapped/MappedObjectTests1.java b/src/java/org/lwjgl/test/mapped/MappedObjectTests1.java
index 8922b06d..bc02a406 100644
--- a/src/java/org/lwjgl/test/mapped/MappedObjectTests1.java
+++ b/src/java/org/lwjgl/test/mapped/MappedObjectTests1.java
@@ -89,17 +89,34 @@ public class MappedObjectTests1 {
 			vecs.view = 0;
 		}
 
-		// test bound check
+		// test bounds checking
 		{
 			assert (vecs.view == 0);
 			try {
+				vecs.view = 49;
+				assert vecs.view == 49;
+				vecs.view = 0;
 				vecs.view = 50;
 				System.out.println("org.lwjgl.util.mapped.Checks is false or there is a bug in bounds checking.");
 				vecs.view = 0;
 			} catch (IndexOutOfBoundsException e) {
 				// expected, ignore
 			}
+
 			assert (vecs.view == 0);
+
+			try {
+				vecs.view = 10;
+				MappedFloat vecs2 = vecs.slice();
+				vecs.view = 0;
+
+				vecs2.view = 39;
+				assert vecs2.view == 39;
+				vecs2.view = 40;
+				System.out.println("org.lwjgl.util.mapped.Checks is false or there is a bug in bounds checking.");
+			} catch (IndexOutOfBoundsException e) {
+				// expected, ignore
+			}
 		}
 
 		// test dup
diff --git a/src/java/org/lwjgl/util/mapped/MappedObject.java b/src/java/org/lwjgl/util/mapped/MappedObject.java
index e08ec3ae..35bc1320 100644
--- a/src/java/org/lwjgl/util/mapped/MappedObject.java
+++ b/src/java/org/lwjgl/util/mapped/MappedObject.java
@@ -97,7 +97,7 @@ public class MappedObject {
 	}
 
 	final void checkAddress(final long address) {
-		if ( preventGC.capacity() < (address + stride - baseAddress) )
+		if ( preventGC.capacity() < (address - MappedObjectUnsafe.getBufferBaseAddress(preventGC) + stride) )
 			throw new IndexOutOfBoundsException();
 	}