diff --git a/src/OpenFOAM/global/argList/argList.C b/src/OpenFOAM/global/argList/argList.C
index 9d7b3b648a..a2e79e3fc5 100644
--- a/src/OpenFOAM/global/argList/argList.C
+++ b/src/OpenFOAM/global/argList/argList.C
@@ -953,8 +953,10 @@ Foam::argList::argList
                     Info<< nl
                         <<"Error: option '-" << optName
                         << "' requires an argument" << nl << nl
-                        << "See '" << executable_ << " -help' for usage"
-                        << nl << nl;
+                        << "See '" << executable_ << " -help' for usage" << nl
+                        << " or '" << executable_
+                        << " -help-full' for extended usage" << nl
+                        << nl;
 
                     Pstream::exit(1);  // works for serial and parallel
                 }
@@ -2035,8 +2037,10 @@ bool Foam::argList::check(bool checkArgs, bool checkOpts) const
         {
             FatalError
                 << nl
-                << "See '" << executable_ << " -help' for usage"
-                << nl << nl;
+                << "See '" << executable_ << " -help' for usage" << nl
+                << " or '" << executable_
+                << " -help-full' for extended usage" << nl
+                << nl;
         }
     }
 
diff --git a/wmake/wclean b/wmake/wclean
index 67d72fef18..5eca00b25b 100755
--- a/wmake/wclean
+++ b/wmake/wclean
@@ -86,6 +86,7 @@ die()
     while [ "$#" -ge 1 ]; do echo "    $1"; shift; done
     echo
     echo "See '${0##*/} -help' for usage"
+    echo " or '${0##*/} -help-full' for extended usage"
     echo
     exit 1
 }
diff --git a/wmake/wmake b/wmake/wmake
index d30b040843..805f575b98 100755
--- a/wmake/wmake
+++ b/wmake/wmake
@@ -172,6 +172,7 @@ die()
     while [ "$#" -ge 1 ]; do echo "    $1"; shift; done
     echo
     echo "See '${0##*/} -help' for usage"
+    echo " or '${0##*/} -help-full' for extended usage"
     echo
     exit 1
 }