diff --git a/src/Metal/MTLIntersectionFunctionTable.cs b/src/Metal/MTLIntersectionFunctionTable.cs
index 901932390d..73ed5a18c3 100644
--- a/src/Metal/MTLIntersectionFunctionTable.cs
+++ b/src/Metal/MTLIntersectionFunctionTable.cs
@@ -29,6 +29,7 @@ namespace Metal {
 					table.SetBuffers ((IntPtr) buffersPtr, (IntPtr) offsetsPtr, range);
 				}
 			}
+			GC.KeepAlive (buffers);
 		}
 	}
 }