diff --git a/doc/README b/doc/README
index 2d8755731b0f4b5faa5d905af99fecd14d7ee0bf..ea1e6e719e5623c24a7d0c6e07b055edd2b1441c 100644
--- a/doc/README
+++ b/doc/README
@@ -12,3 +12,10 @@ $doxygen Doxyfile
 
 The html file index.html should be in doc/html. 
 
+Debian
+=====================
+#To build documentation first install dependencies (doxygen, doxyqml and dot):
+sudo apt install doxygen graphviz doxyqml
+
+#Then build documentation in the doc/ directory
+doxygen ./Doxyfile
diff --git a/doc/dot b/doc/dot
index 48ed5a4abe0bb4f3b654e12ac344493be34dab8e..07f4f280d5912049140ae63bfd8feb85609afadb 100755
--- a/doc/dot
+++ b/doc/dot
@@ -34,4 +34,13 @@ do
   fi
 done
 
-/usr/local/bin/dot ${ARGS}
+if [[ -x "/usr/local/bin/dot" ]]  
+then
+  /usr/local/bin/dot ${ARGS}
+elif [[ -x "/usr/bin/dot" ]]
+then 
+  /usr/bin/dot ${ARGS}
+else
+  echo "Program dot not found: See file doc/dot"
+  exit 1
+fi