diff --git a/src/output.cpp b/src/output.cpp
index 1b896a9299..49784cc0f9 100644
--- a/src/output.cpp
+++ b/src/output.cpp
@@ -133,11 +133,12 @@ void Output::setup(int flag)
   // will not write on last step of run unless multiple of every
   // set next_dump_any to smallest next_dump
   // if no dumps, set next_dump_any to last+1 so will not influence next
-  // dump custom may invoke computes so wrap with clear/add
+  // dump custom/cfg may invoke computes so wrap with clear/add
 
   if (ndump && update->restrict_output == 0) {
     for (int idump = 0; idump < ndump; idump++) {
-      if (strcmp(dump[idump]->style,"custom") == 0)
+      if (strcmp(dump[idump]->style,"custom") == 0 ||
+	  strcmp(dump[idump]->style,"cfg") == 0)
 	modify->clearstep_compute();
       if ((ntimestep % dump_every[idump] == 0 && 
 	  last_dump[idump] != ntimestep) || last_dump[idump] < 0) {
@@ -146,7 +147,8 @@ void Output::setup(int flag)
       }
       next_dump[idump] = 
 	(ntimestep/dump_every[idump])*dump_every[idump] + dump_every[idump];
-      if (strcmp(dump[idump]->style,"custom") == 0)
+      if (strcmp(dump[idump]->style,"custom") == 0 ||
+	  strcmp(dump[idump]->style,"cfg") == 0)
 	modify->addstep_compute(next_dump[idump]);
       if (idump) next_dump_any = MYMIN(next_dump_any,next_dump[idump]);
       else next_dump_any = next_dump[0];
@@ -199,17 +201,19 @@ void Output::setup(int flag)
 void Output::write(int ntimestep)
 {
   // next_dump does not force output on last step of run
-  // dump custom may invoke computes so wrap with clear/add
+  // dump custom/cfg may invoke computes so wrap with clear/add
 
   if (next_dump_any == ntimestep) {
     for (int idump = 0; idump < ndump; idump++) {
       if (next_dump[idump] == ntimestep && last_dump[idump] != ntimestep) {
-        if (strcmp(dump[idump]->style,"custom") == 0)
+        if (strcmp(dump[idump]->style,"custom") == 0 ||
+	    strcmp(dump[idump]->style,"cfg") == 0)
           modify->clearstep_compute();
 	dump[idump]->write();
 	last_dump[idump] = ntimestep;
 	next_dump[idump] += dump_every[idump];
-        if (strcmp(dump[idump]->style,"custom") == 0)
+        if (strcmp(dump[idump]->style,"custom") == 0 ||
+	    strcmp(dump[idump]->style,"cfg") == 0)
 	  modify->addstep_compute(next_dump[idump]);
       }
       if (idump) next_dump_any = MYMIN(next_dump_any,next_dump[idump]);