diff --git a/src/Orleans.Runtime/Placement/PlacementService.cs b/src/Orleans.Runtime/Placement/PlacementService.cs
index 9c8dee8154..cd17709a05 100644
--- a/src/Orleans.Runtime/Placement/PlacementService.cs
+++ b/src/Orleans.Runtime/Placement/PlacementService.cs
@@ -126,7 +126,7 @@ public SiloAddress[] GetCompatibleSilos(PlacementTarget target)
                 throw new OrleansException(
                     $"No active nodes are compatible with grain {grainType} and interface {target.InterfaceType} version {target.InterfaceVersion}. "
                     + $"Known nodes with grain type: {allWithTypeString}. "
-                    + $"All known nodes compatible with interface version: {allWithTypeString}");
+                    + $"All known nodes compatible with interface version: {allWithInterfaceString}");
             }
 
             return compatibleSilos;