diff --git a/Makefile.am b/Makefile.am
index 446eb39..2e16a76 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -18,7 +18,8 @@ TESTS=testcases/largefilesupport.sh \
       testcases/verify_deterministic_operation.sh \
       testcases/checksum_options.sh \
       testcases/md5collisions.sh \
-      testcases/sha1collisions.sh
+      testcases/sha1collisions.sh \
+      testcases/verify_outputdelimiter_option.sh
 
 AUXFILES=testcases/common_funcs.sh \
          testcases/md5collisions/letter_of_rec.ps \
diff --git a/Rdutil.cc b/Rdutil.cc
index f1f2ed7..ed00a5d 100644
--- a/Rdutil.cc
+++ b/Rdutil.cc
@@ -25,8 +25,15 @@
 // class declaration
 #include "Rdutil.hh"
 
+
 int
 Rdutil::printtofile(const std::string& filename) const
+{
+  return printtofile(filename, " ");
+}
+
+int
+Rdutil::printtofile(const std::string& filename, const std::string& delimiter) const
 {
   // open a file to print to
   std::ofstream f1;
@@ -46,9 +53,9 @@ Rdutil::printtofile(const std::string& filename) const
 
   std::vector<Fileinfo>::iterator it;
   for (it = m_list.begin(); it != m_list.end(); ++it) {
-    output << Fileinfo::getduptypestring(*it) << " " << it->getidentity() << " "
-           << it->depth() << " " << it->size() << " " << it->device() << " "
-           << it->inode() << " " << it->get_cmdline_index() << " " << it->name()
+    output << Fileinfo::getduptypestring(*it) << delimiter << it->getidentity() << delimiter
+           << it->depth() << delimiter << it->size() << delimiter << it->device() << delimiter
+           << it->inode() << delimiter << it->get_cmdline_index() << delimiter << it->name()
            << '\n';
   }
   output << "# end of file\n";
diff --git a/Rdutil.hh b/Rdutil.hh
index e5693ab..8d46ea9 100644
--- a/Rdutil.hh
+++ b/Rdutil.hh
@@ -27,6 +27,14 @@ public:
    */
   int printtofile(const std::string& filename) const;
 
+  /**
+   * print file names to a file, with extra information.
+   * @param filename
+   * @param delimiter
+   * @return zero on success
+   */
+  int printtofile(const std::string& filename, const std::string& delimiter) const;
+
   /// mark files with a unique number
   void markitems();
 
diff --git a/rdfind.cc b/rdfind.cc
index fbd6cb8..afed07d 100644
--- a/rdfind.cc
+++ b/rdfind.cc
@@ -11,6 +11,7 @@
 #include <iostream>
 #include <string>
 #include <vector>
+#include <limits>
 
 // project
 #include "CmdlineParser.hh"
@@ -108,6 +109,7 @@ struct Options
   bool deterministic = true; // be independent of filesystem order
   long nsecsleep = 0; // number of nanoseconds to sleep between each file read.
   std::string resultsfile = "results.txt"; // results file name.
+  std::string results_delimiter = " "; // fields delimiter in results file
 };
 
 Options
@@ -136,6 +138,8 @@ parseOptions(Parser& parser)
       o.makeresultsfile = parser.get_parsed_bool();
     } else if (parser.try_parse_string("-outputname")) {
       o.resultsfile = parser.get_parsed_string();
+    } else if (parser.try_parse_string("-outputdelimiter")){
+      o.results_delimiter = parser.get_parsed_string();
     } else if (parser.try_parse_bool("-ignoreempty")) {
       if (parser.get_parsed_bool()) {
         o.minimumfilesize = 1;
@@ -397,7 +401,7 @@ main(int narg, const char* argv[])
   if (o.makeresultsfile) {
     std::cout << dryruntext << "Now making results file " << o.resultsfile
               << std::endl;
-    gswd.printtofile(o.resultsfile);
+    gswd.printtofile(o.resultsfile, o.results_delimiter);
   }
 
   // traverse the list and replace with symlinks
diff --git a/testcases/verify_outputdelimiter_option.sh b/testcases/verify_outputdelimiter_option.sh
new file mode 100755
index 0000000..11466b3
--- /dev/null
+++ b/testcases/verify_outputdelimiter_option.sh
@@ -0,0 +1,33 @@
+#!/bin/sh
+# Ensures the exclusion of empty files work as intended.
+#
+
+
+set -e
+. "$(dirname "$0")/common_funcs.sh"
+
+
+
+makefiles() {
+   #make pairs of files, with specific sizes
+   for i in $(seq 0 4) ; do
+      head -c$i /dev/zero >a$i
+      head -c$i /dev/zero >b$i
+   done
+}
+
+
+reset_teststate
+makefiles
+$rdfind -outputdelimiter "," a* b*
+
+fields=$(grep -m 1 DUPTYPE results.txt | awk -F "," '{print NF}')
+verify [ ${fields} -eq 8 ]
+
+
+reset_teststate
+makefiles
+$rdfind -outputdelimiter " " a* b*
+
+fields=$(grep -m 1 DUPTYPE results.txt | awk -F " " '{print NF}')
+verify [ ${fields} -eq 8 ]