diff --git a/src/read_data.cpp b/src/read_data.cpp
index 1d960ef41d..7ed1e58492 100644
--- a/src/read_data.cpp
+++ b/src/read_data.cpp
@@ -339,7 +339,7 @@ void ReadData::header(int flag)
     if (strstr(line,"atoms")) sscanf(line,"%lu",&atom->natoms);
     else if (strstr(line,"bonds")) sscanf(line,"%lu",&atom->nbonds);
     else if (strstr(line,"angles")) sscanf(line,"%lu",&atom->nangles);
-    else if (strstr(line,"dihedrals")) sscanf(line,"lu",&atom->ndihedrals);
+    else if (strstr(line,"dihedrals")) sscanf(line,"%lu",&atom->ndihedrals);
     else if (strstr(line,"impropers")) sscanf(line,"%lu",&atom->nimpropers);
 
     else if (strstr(line,"atom types")) sscanf(line,"%d",&atom->ntypes);
@@ -680,7 +680,7 @@ void ReadData::impropers()
   bigint nimpropers = atom->nimpropers;
 
   while (nread < nimpropers) {
-    nchunk = MIN(nread,CHUNK);
+    nchunk = MIN(nimpropers-nread,CHUNK);
     if (me == 0) {
       char *eof;
       m = 0;
diff --git a/src/replicate.cpp b/src/replicate.cpp
index 6e8d1bffe4..5033b21551 100644
--- a/src/replicate.cpp
+++ b/src/replicate.cpp
@@ -378,20 +378,20 @@ void Replicate::command(int narg, char **arg)
 
   if (me == 0) {
     if (atom->nbonds) {
-      if (screen) fprintf(screen,"  %d bonds\n",atom->nbonds);
-      if (logfile) fprintf(logfile,"  %d bonds\n",atom->nbonds);
+      if (screen) fprintf(screen,"  %lu bonds\n",atom->nbonds);
+      if (logfile) fprintf(logfile,"  %lu bonds\n",atom->nbonds);
     }
     if (atom->nangles) {
-      if (screen) fprintf(screen,"  %d angles\n",atom->nangles);
-      if (logfile) fprintf(logfile,"  %d angles\n",atom->nangles);
+      if (screen) fprintf(screen,"  %lu angles\n",atom->nangles);
+      if (logfile) fprintf(logfile,"  %lu angles\n",atom->nangles);
     }
     if (atom->ndihedrals) {
-      if (screen) fprintf(screen,"  %d dihedrals\n",atom->ndihedrals);
-      if (logfile) fprintf(logfile,"  %d dihedrals\n",atom->ndihedrals);
+      if (screen) fprintf(screen,"  %lu dihedrals\n",atom->ndihedrals);
+      if (logfile) fprintf(logfile,"  %lu dihedrals\n",atom->ndihedrals);
     }
     if (atom->nimpropers) {
-      if (screen) fprintf(screen,"  %d impropers\n",atom->nimpropers);
-      if (logfile) fprintf(logfile,"  %d impropers\n",atom->nimpropers);
+      if (screen) fprintf(screen,"  %lu impropers\n",atom->nimpropers);
+      if (logfile) fprintf(logfile,"  %lu impropers\n",atom->nimpropers);
     }
   }