diff --git a/darshan-util/darshan-job-summary/bin/darshan-job-summary.pl.in b/darshan-util/darshan-job-summary/bin/darshan-job-summary.pl.in
index 393229676703be2744664ec117fab5d9dcd7aee5..cab377f29eace7413e9433d7885c10bc5178b219 100755
--- a/darshan-util/darshan-job-summary/bin/darshan-job-summary.pl.in
+++ b/darshan-util/darshan-job-summary/bin/darshan-job-summary.pl.in
@@ -425,14 +425,28 @@ close TIME_SUMMARY;
 # counts of operations
 open(PSX_OP_COUNTS, ">$tmp_dir/posix-op-counts.dat") || die("error opening output file: $!\n");
 print PSX_OP_COUNTS "# <operation>, <POSIX count>\n";
-print PSX_OP_COUNTS
-    "Read, ", $summary{POSIX_READS} + $summary{POSIX_FREADS}, "\n",
-    "Write, ", $summary{POSIX_WRITES} + $summary{POSIX_FWRITES}, "\n",
-    "Open, ", $summary{POSIX_OPENS} + $summary{POSIX_FOPENS}, "\n",
-    "Stat, ", $summary{POSIX_STATS}, "\n",
-    "Seek, ", $summary{POSIX_SEEKS}, "\n",
-    "Mmap, ", $summary{POSIX_MMAPS}, "\n",
-    "Fsync, ", $summary{POSIX_FSYNCS} + $summary{POSIX_FDSYNCS}, "\n";
+if (defined $summary{POSIX_OPENS})
+{
+    print PSX_OP_COUNTS
+        "Read, ", $summary{POSIX_READS}, "\n",
+        "Write, ", $summary{POSIX_WRITES}, "\n",
+        "Open, ", $summary{POSIX_OPENS}, "\n",
+        "Stat, ", $summary{POSIX_STATS}, "\n",
+        "Seek, ", $summary{POSIX_SEEKS}, "\n",
+        "Mmap, ", $summary{POSIX_MMAPS}, "\n",
+        "Fsync, ", $summary{POSIX_FSYNCS} + $summary{POSIX_FDSYNCS}, "\n";
+}
+else
+{
+    print PSX_OP_COUNTS
+        "Read, 0\n",
+        "Write, 0\n",
+        "Open, 0\n",
+        "Stat, 0\n",
+        "Seek, 0\n",
+        "Mmap, 0\n",
+        "Fsync, 0\n";
+}
 close PSX_OP_COUNTS;
 
 if (defined $summary{MPIIO_INDEP_OPENS})
@@ -451,6 +465,21 @@ if (defined $summary{MPIIO_INDEP_OPENS})
     close MPI_OP_COUNTS;
 }
 
+if (defined $summary{STDIO_OPENS})
+{
+    open(STDIO_OP_COUNTS, ">$tmp_dir/stdio-op-counts.dat") || die("error opening output file: $!\n");
+    print STDIO_OP_COUNTS "# <operation>, <STDIO count>\n";
+    print STDIO_OP_COUNTS
+        "Read, ", $summary{STDIO_READS}, "\n",
+        "Write, ", $summary{STDIO_WRITES}, "\n",
+        "Open, ", $summary{STDIO_OPENS}, "\n",
+        "Stat, 0\n",
+        "Seek, ", $summary{STDIO_SEEKS}, "\n",
+        "Mmap, 0\n",
+        "Fsync, ", $summary{STDIO_FLUSHES}, "\n";
+    close STDIO_OP_COUNTS;
+}
+
 # histograms of reads and writes (for POSIX and MPI-IO modules)
 open (IO_HIST, ">$tmp_dir/posix-access-hist.dat") || die("error opening output file: $!\n");
 print IO_HIST "# <size_range>, <POSIX_reads>, <POSIX_writes>\n";
@@ -984,6 +1013,18 @@ if (defined $summary{MPIIO_INDEP_OPENS})
     close OP_COUNTS_PLT;
 }
 
+# do any extra work needed for plotting stdio graphs
+if (defined $summary{STDIO_OPENS})
+{
+    open(OP_COUNTS_PLT, ">>$tmp_dir/op-counts-eps.gplt") || die("error opening output file: $!\n");
+    my $tmp_sz = -s "$tmp_dir/op-counts-eps.gplt";
+    # overwrite existing newline
+    truncate(OP_COUNTS_PLT, $tmp_sz-1);
+    print OP_COUNTS_PLT ", \\
+    \"stdio-op-counts.dat\" using 2:xtic(1) title \"STDIO\"\n";
+    close OP_COUNTS_PLT;
+}
+
 # execute base gnuplot scripts
 system "$gnuplot time-summary-eps.gplt";
 system "$epstopdf time-summary.eps";