diff --git a/src/MC/fix_charge_regulation.cpp b/src/MC/fix_charge_regulation.cpp
index cd035781c8..ddf14f6804 100644
--- a/src/MC/fix_charge_regulation.cpp
+++ b/src/MC/fix_charge_regulation.cpp
@@ -218,7 +218,7 @@ void FixChargeRegulation::init() {
     int flagall = flag;
 
     MPI_Allreduce(&flag, &flagall, 1, MPI_INT, MPI_SUM, world);
-    if (flagall && comm->me == 0)
+    if (flagall)
       error->all(FLERR, "fix charge/regulation cannot exchange "
                  "individual atoms (ions) belonging to a molecule");
   }
diff --git a/src/MC/fix_gcmc.cpp b/src/MC/fix_gcmc.cpp
index e0f1cd243b..8fb778207b 100644
--- a/src/MC/fix_gcmc.cpp
+++ b/src/MC/fix_gcmc.cpp
@@ -564,7 +564,7 @@ void FixGCMC::init()
         if (molecule[i]) flag = 1;
     int flagall;
     MPI_Allreduce(&flag,&flagall,1,MPI_INT,MPI_SUM,world);
-    if (flagall && comm->me == 0)
+    if (flagall)
       error->all(FLERR, "Fix gcmc cannot exchange individual atoms belonging to a molecule");
   }
 
@@ -579,7 +579,7 @@ void FixGCMC::init()
         if (molecule[i] == 0) flag = 1;
     int flagall;
     MPI_Allreduce(&flag,&flagall,1,MPI_INT,MPI_SUM,world);
-    if (flagall && comm->me == 0)
+    if (flagall)
       error->all(FLERR, "All mol IDs should be set for fix gcmc group atoms");
   }
 
diff --git a/src/MC/fix_widom.cpp b/src/MC/fix_widom.cpp
index 2c76050430..c72beb5051 100644
--- a/src/MC/fix_widom.cpp
+++ b/src/MC/fix_widom.cpp
@@ -356,7 +356,7 @@ void FixWidom::init()
         if (molecule[i] == 0) flag = 1;
     int flagall;
     MPI_Allreduce(&flag,&flagall,1,MPI_INT,MPI_SUM,world);
-    if (flagall && comm->me == 0)
+    if (flagall)
       error->all(FLERR, "All mol IDs should be set for fix widom group atoms");
   }