diff --git a/src/main/java/li/cil/circuity/vm/device/memory/ByteBufferMemory.java b/src/main/java/li/cil/circuity/vm/device/memory/ByteBufferMemory.java
index ff1f672b..b02ad38a 100644
--- a/src/main/java/li/cil/circuity/vm/device/memory/ByteBufferMemory.java
+++ b/src/main/java/li/cil/circuity/vm/device/memory/ByteBufferMemory.java
@@ -29,7 +29,7 @@ public class ByteBufferMemory implements PhysicalMemory {
 
     @Override
     public int load(final int offset, final int sizeLog2) throws MemoryAccessException {
-        if (offset < 0 || offset >= data.limit()) {
+        if (offset < 0 || offset >= data.limit() - (1 << sizeLog2)) {
             throw new LoadFaultException(offset);
         }
         switch (sizeLog2) {
@@ -46,7 +46,7 @@ public class ByteBufferMemory implements PhysicalMemory {
 
     @Override
     public void store(final int offset, final int value, final int sizeLog2) throws MemoryAccessException {
-        if (offset < 0 || offset >= data.limit()) {
+        if (offset < 0 || offset >= data.limit() - (1 << sizeLog2)) {
             throw new StoreFaultException(offset);
         }
         switch (sizeLog2) {
diff --git a/src/main/java/li/cil/circuity/vm/device/memory/UnsafeMemory.java b/src/main/java/li/cil/circuity/vm/device/memory/UnsafeMemory.java
index 6ab0cedc..7274099a 100644
--- a/src/main/java/li/cil/circuity/vm/device/memory/UnsafeMemory.java
+++ b/src/main/java/li/cil/circuity/vm/device/memory/UnsafeMemory.java
@@ -52,17 +52,15 @@ public final class UnsafeMemory implements PhysicalMemory {
 
     @Override
     public int load(final int offset, final int sizeLog2) throws MemoryAccessException {
-        if (offset < 0 || offset >= size) {
+        if (offset < 0 || offset >= size - (1 << sizeLog2)) {
             throw new LoadFaultException(offset);
         }
         switch (sizeLog2) {
             case Sizes.SIZE_8_LOG2:
                 return UNSAFE.getByte(address + offset);
             case Sizes.SIZE_16_LOG2:
-                assert (offset & 0b1) == 0;
                 return UNSAFE.getShort(address + offset);
             case Sizes.SIZE_32_LOG2:
-                assert (offset & 0b11) == 0;
                 return UNSAFE.getInt(address + offset);
             default:
                 throw new IllegalArgumentException();
@@ -71,7 +69,7 @@ public final class UnsafeMemory implements PhysicalMemory {
 
     @Override
     public void store(final int offset, final int value, final int sizeLog2) throws MemoryAccessException {
-        if (offset < 0 || offset >= size) {
+        if (offset < 0 || offset >= size - (1 << sizeLog2)) {
             throw new LoadFaultException(offset);
         }
         switch (sizeLog2) {
@@ -79,11 +77,9 @@ public final class UnsafeMemory implements PhysicalMemory {
                 UNSAFE.putByte(address + offset, (byte) value);
                 break;
             case Sizes.SIZE_16_LOG2:
-                assert (offset & 0b1) == 0;
                 UNSAFE.putShort(address + offset, (short) value);
                 break;
             case Sizes.SIZE_32_LOG2:
-                assert (offset & 0b11) == 0;
                 UNSAFE.putInt(address + offset, value);
                 break;
             default: