diff --git a/reactos/drivers/storage/classpnp/power.c b/reactos/drivers/storage/classpnp/power.c
index 9d307f00ac8..195792f0ae5 100644
--- a/reactos/drivers/storage/classpnp/power.c
+++ b/reactos/drivers/storage/classpnp/power.c
@@ -465,6 +465,11 @@ ClasspPowerUpCompletionFailure:
 
             return status;
         }
+
+        case PowerUpDeviceInitial: {
+            NT_ASSERT(context->PowerChangeState.PowerUp != PowerUpDeviceInitial);
+            break;
+        }
     }
 
     return STATUS_MORE_PROCESSING_REQUIRED;
@@ -965,6 +970,11 @@ ClasspPowerDownCompletion(
 
             return status;
         }
+
+        case PowerDownDeviceInitial2: {
+            NT_ASSERT(context->PowerChangeState.PowerDown2 != PowerDownDeviceInitial2);
+            break;
+        }
     }
 
     return STATUS_MORE_PROCESSING_REQUIRED;
@@ -1050,6 +1060,8 @@ ClasspPowerHandler(
                             SET_FLAG(DeviceObject->Flags, DO_VERIFY_VOLUME);
                         }
                         break;
+                    default:
+                        break;
                 }
             
             break;
@@ -1326,6 +1338,8 @@ ClassMinimalPowerHandler(
                             SET_FLAG(fdoExtension->DeviceObject->Flags, DO_VERIFY_VOLUME);  
                         } 
                         break;
+                    default:
+                        break;
                 }
             } 
         }