diff --git a/src/USER-MISC/fix_ave_correlate_long.cpp b/src/USER-MISC/fix_ave_correlate_long.cpp
index b1bcc07fa7..3a28e47cda 100644
--- a/src/USER-MISC/fix_ave_correlate_long.cpp
+++ b/src/USER-MISC/fix_ave_correlate_long.cpp
@@ -504,7 +504,8 @@ void FixAveCorrelateLong::end_of_step()
     fflush(fp);
     if (overwrite) {
       long fileend = ftell(fp);
-      if (fileend > 0) ftruncate(fileno(fp),fileend);
+      if ((fileend > 0) && (ftruncate(fileno(fp),fileend)))
+        perror("Error while tuncating output");
     }
   }
 
diff --git a/src/fix_ave_chunk.cpp b/src/fix_ave_chunk.cpp
index 45eb38f5c2..0ebdddb9df 100644
--- a/src/fix_ave_chunk.cpp
+++ b/src/fix_ave_chunk.cpp
@@ -1055,7 +1055,8 @@ void FixAveChunk::end_of_step()
 
     if (overwrite) {
       long fileend = ftell(fp);
-      if (fileend > 0) ftruncate(fileno(fp),fileend);
+      if ((fileend > 0) && (ftruncate(fileno(fp),fileend)))
+        perror("Error while tuncating output");
     }
   }
 }
diff --git a/src/fix_ave_correlate.cpp b/src/fix_ave_correlate.cpp
index f65b53efc8..0a8a4cd17f 100644
--- a/src/fix_ave_correlate.cpp
+++ b/src/fix_ave_correlate.cpp
@@ -535,7 +535,8 @@ void FixAveCorrelate::end_of_step()
 
     if (overwrite) {
       long fileend = ftell(fp);
-      if (fileend > 0) ftruncate(fileno(fp),fileend);
+      if ((fileend > 0) && (ftruncate(fileno(fp),fileend)))
+        perror("Error while tuncating output");
     }
   }
 
diff --git a/src/fix_ave_histo.cpp b/src/fix_ave_histo.cpp
index 5a5de6d0b6..1a292bf8d2 100644
--- a/src/fix_ave_histo.cpp
+++ b/src/fix_ave_histo.cpp
@@ -851,7 +851,8 @@ void FixAveHisto::end_of_step()
     fflush(fp);
     if (overwrite) {
       long fileend = ftell(fp);
-      if (fileend > 0) ftruncate(fileno(fp),fileend);
+      if ((fileend > 0) && (ftruncate(fileno(fp),fileend)))
+        perror("Error while tuncating output");
     }
   }
 }
diff --git a/src/fix_ave_histo_weight.cpp b/src/fix_ave_histo_weight.cpp
index f4ff0ae55f..4b86681153 100644
--- a/src/fix_ave_histo_weight.cpp
+++ b/src/fix_ave_histo_weight.cpp
@@ -493,7 +493,8 @@ void FixAveHistoWeight::end_of_step()
     fflush(fp);
     if (overwrite) {
       long fileend = ftell(fp);
-      if (fileend > 0) ftruncate(fileno(fp),fileend);
+      if ((fileend > 0) && (ftruncate(fileno(fp),fileend)))
+        perror("Error while tuncating output");
     }
   }
 }
diff --git a/src/fix_ave_time.cpp b/src/fix_ave_time.cpp
index 05d556d0c8..90bef7dc65 100644
--- a/src/fix_ave_time.cpp
+++ b/src/fix_ave_time.cpp
@@ -698,7 +698,8 @@ void FixAveTime::invoke_scalar(bigint ntimestep)
 
     if (overwrite) {
       long fileend = ftell(fp);
-      if (fileend > 0) ftruncate(fileno(fp),fileend);
+      if ((fileend > 0) && (ftruncate(fileno(fp),fileend)))
+        perror("Error while tuncating output");
     }
   }
 }