diff --git a/KerbalEngineer/Extensions/PartExtensions.cs b/KerbalEngineer/Extensions/PartExtensions.cs
index 49640dd5..d986941c 100644
--- a/KerbalEngineer/Extensions/PartExtensions.cs
+++ b/KerbalEngineer/Extensions/PartExtensions.cs
@@ -149,7 +149,7 @@ public static double getCrewAdjustment(this Part part)
 
                     if (actualCrew < crew)
                     {
-                        return PhysicsGlobals.KerbalCrewMass * (crew - actualCrew);
+                        return -PhysicsGlobals.KerbalCrewMass * (crew - actualCrew);
                     }
 
                 }