--- a/liboctave/CSparse.cc
+++ b/liboctave/CSparse.cc
@@ -5650,20 +5650,18 @@
 	  cm->hypotenuse = CHOLMOD_NAME(hypot);
 
 #ifdef HAVE_METIS
-	  // METIS 4.0.1 uses malloc and free, and will terminate MATLAB if
-	  // it runs out of memory.  Use CHOLMOD's memory guard for METIS, 
-	  // which mxMalloc's a huge block of memory (and then immediately 
-	  // mxFree's it) before calling METIS
+	  // METIS 4.0.1 uses malloc and free, and will terminate if
+	  // it runs out of memory.  Use CHOLMOD's memory guard for
+	  // METIS, which allocates a huge block of memory (and then
+	  // immediately frees it) before calling METIS
 	  cm->metis_memory = 2.0;
 
 #if defined(METIS_VERSION)
 #if (METIS_VERSION >= METIS_VER(4,0,2))
-	  // METIS 4.0.2 uses function pointers for malloc and free
+	  // METIS 4.0.2 uses function pointers for malloc and free.
 	  METIS_malloc = cm->malloc_memory;
 	  METIS_free   = cm->free_memory;
-	  // Turn off METIS memory guard.  It is not needed, because mxMalloc
-	  // will safely terminate the mexFunction and free any workspace
-	  // without killing all of octave.
+	  // Turn off METIS memory guard.
 	  cm->metis_memory   = 0.0;
 #endif
 #endif