diff --git a/src/ayab/solenoids.cpp b/src/ayab/solenoids.cpp
index 0659283d..b8a021c8 100644
--- a/src/ayab/solenoids.cpp
+++ b/src/ayab/solenoids.cpp
@@ -123,7 +123,7 @@ void Solenoids::write(uint16_t newState) {
     bankB << 1;
   }
 
-  mcp.writeGPIOAB(bankA & bankB);
+  mcp.writeGPIOAB(bankA & (bankB << 8));
 
   #endif
 }