diff --git a/src/fix_com.cpp b/src/fix_com.cpp
index 37b05ee0cf..16194b8157 100644
--- a/src/fix_com.cpp
+++ b/src/fix_com.cpp
@@ -85,6 +85,8 @@ void FixCOM::end_of_step()
   double xcm[3];
   group->xcm(igroup,masstotal,xcm);
 
-  if (me == 0) fprintf(fp,"%d %g %g %g\n",
-		       update->ntimestep,xcm[0],xcm[1],xcm[2]);
+  if (me == 0) {
+    fprintf(fp,"%d %g %g %g\n",update->ntimestep,xcm[0],xcm[1],xcm[2]);
+    fflush(fp);
+  }
 }
diff --git a/src/fix_gyration.cpp b/src/fix_gyration.cpp
index aee1221130..c3d10f8943 100644
--- a/src/fix_gyration.cpp
+++ b/src/fix_gyration.cpp
@@ -86,5 +86,8 @@ void FixGyration::end_of_step()
   group->xcm(igroup,masstotal,xcm);
   double rg = group->gyration(igroup,masstotal,xcm);
 
-  if (me == 0) fprintf(fp,"%d %g\n",update->ntimestep,rg);
+  if (me == 0) {
+    fprintf(fp,"%d %g\n",update->ntimestep,rg);
+    fflush(fp);
+  }
 }
diff --git a/src/fix_msd.cpp b/src/fix_msd.cpp
index f4c862d475..54507067c0 100644
--- a/src/fix_msd.cpp
+++ b/src/fix_msd.cpp
@@ -242,8 +242,11 @@ void FixMSD::end_of_step()
   msd_all[2] /= nmsd;
   msd_all[3] /= nmsd;
 
-  if (me == 0) fprintf(fp,"%d %g %g %g %g\n",update->ntimestep,
-		       msd_all[0],msd_all[1],msd_all[2],msd_all[3]);
+  if (me == 0) {
+    fprintf(fp,"%d %g %g %g %g\n",update->ntimestep,
+	    msd_all[0],msd_all[1],msd_all[2],msd_all[3]);
+    fflush(fp);
+  }
 }
 
 /* ----------------------------------------------------------------------
diff --git a/src/fix_print.cpp b/src/fix_print.cpp
index b4848d75aa..198b1fd8be 100644
--- a/src/fix_print.cpp
+++ b/src/fix_print.cpp
@@ -114,6 +114,9 @@ void FixPrint::end_of_step()
   if (me == 0) {
     if (screenflag && screen) fprintf(screen,copy);
     if (screenflag && logfile) fprintf(logfile,copy);
-    if (fp) fprintf(fp,copy);
+    if (fp) {
+      fprintf(fp,copy);
+      fflush(fp);
+    }
   }
 }
diff --git a/src/fix_rdf.cpp b/src/fix_rdf.cpp
index dc78212f08..5ea7ea7c41 100644
--- a/src/fix_rdf.cpp
+++ b/src/fix_rdf.cpp
@@ -323,5 +323,7 @@ void FixRDF::end_of_step()
       }
       fprintf(fp,"\n");
     }
+
+    fflush(fp);
   }
 }
diff --git a/src/fix_tmd.cpp b/src/fix_tmd.cpp
index 39d623aed7..39a77f37a9 100644
--- a/src/fix_tmd.cpp
+++ b/src/fix_tmd.cpp
@@ -287,6 +287,7 @@ void FixTMD::initial_integrate(int vflag)
       fprintf(fp,"%d %g %g %g %g %g %g %g\n",
 	      update->ntimestep,rho_target,rho_old,
               gamma_back,gamma_forward,lambda,work_lambda,work_analytical);
+      fflush(fp);
       previous_stat = update->ntimestep;
     }
   }