diff --git a/src/m68k.rs b/src/m68k.rs
index 9c9ea28..b05fd73 100644
--- a/src/m68k.rs
+++ b/src/m68k.rs
@@ -1547,6 +1547,9 @@ impl M68K {
 
     fn write_word(&mut self, address: u32, data: u16) -> Result<(), DetailedBusError> {
         let address = address & 0xFF_FFFF;
+        if address & 0x1 != 0 {
+            self.trap(3)?;
+        }
         if self.use_stored_mem_cycles {
             let cycle = self.stored_mem_cycles.remove(0);
             if let MemCycleInfo::WriteWord {