diff --git a/Mesh/meshPartition.cpp b/Mesh/meshPartition.cpp
index 921965d3992b6667b430ee38c0e879c724ea93c6..1b846a31046e5af0771d601b5ccb757456cd84cc 100644
--- a/Mesh/meshPartition.cpp
+++ b/Mesh/meshPartition.cpp
@@ -31,10 +31,6 @@
 
 //--Prototype for Chaco interface
 
-#ifdef interface
-#undef interface
-#endif
-
 extern "C" int interface
 (int nvtxs, int *start, int *adjacency, int *vwgts, float *ewgts,
  float *x, float *y, float *z,