diff --git a/src/dump_atom.cpp b/src/dump_atom.cpp
index 5641b4ea53..2287c10c68 100644
--- a/src/dump_atom.cpp
+++ b/src/dump_atom.cpp
@@ -162,10 +162,8 @@ void DumpAtom::header_binary(bigint ndump)
   fwrite(&boxzlo,sizeof(double),1,fp);
   fwrite(&boxzhi,sizeof(double),1,fp);
   fwrite(&size_one,sizeof(int),1,fp);
-  if (multiproc) {
-    int one = 1;
-    fwrite(&one,sizeof(int),1,fp);
-  } else fwrite(&nprocs,sizeof(int),1,fp);
+  if (multiproc) fwrite(&nclusterprocs,sizeof(int),1,fp);
+  else fwrite(&nprocs,sizeof(int),1,fp);
 }
 
 /* ---------------------------------------------------------------------- */
@@ -186,10 +184,8 @@ void DumpAtom::header_binary_triclinic(bigint ndump)
   fwrite(&boxxz,sizeof(double),1,fp);
   fwrite(&boxyz,sizeof(double),1,fp);
   fwrite(&size_one,sizeof(int),1,fp);
-  if (multiproc) {
-    int one = 1;
-    fwrite(&one,sizeof(int),1,fp);
-  } else fwrite(&nprocs,sizeof(int),1,fp);
+  if (multiproc) fwrite(&nclusterprocs,sizeof(int),1,fp);
+  else fwrite(&nprocs,sizeof(int),1,fp);
 }
 
 /* ---------------------------------------------------------------------- */
diff --git a/src/dump_custom.cpp b/src/dump_custom.cpp
index b2b9cf04ce..1146660511 100644
--- a/src/dump_custom.cpp
+++ b/src/dump_custom.cpp
@@ -298,10 +298,8 @@ void DumpCustom::header_binary(bigint ndump)
   fwrite(&boxzlo,sizeof(double),1,fp);
   fwrite(&boxzhi,sizeof(double),1,fp);
   fwrite(&size_one,sizeof(int),1,fp);
-  if (multiproc) {
-    int one = 1;
-    fwrite(&one,sizeof(int),1,fp);
-  } else fwrite(&nprocs,sizeof(int),1,fp);
+  if (multiproc) fwrite(&nclusterprocs,sizeof(int),1,fp);
+  else fwrite(&nprocs,sizeof(int),1,fp);
 }
 
 /* ---------------------------------------------------------------------- */
@@ -322,10 +320,8 @@ void DumpCustom::header_binary_triclinic(bigint ndump)
   fwrite(&boxxz,sizeof(double),1,fp);
   fwrite(&boxyz,sizeof(double),1,fp);
   fwrite(&size_one,sizeof(int),1,fp);
-  if (multiproc) {
-    int one = 1;
-    fwrite(&one,sizeof(int),1,fp);
-  } else fwrite(&nprocs,sizeof(int),1,fp);
+  if (multiproc) fwrite(&nclusterprocs,sizeof(int),1,fp);
+  else fwrite(&nprocs,sizeof(int),1,fp);
 }
 
 /* ---------------------------------------------------------------------- */