diff --git a/src/OpenFOAM/primitives/bools/Switch/Switch.C b/src/OpenFOAM/primitives/bools/Switch/Switch.C
index 0b87ca6e2764648ded5bc6113dde8fc88f9687cc..3a227f99b4a42fd69466a8d73e795ebb1bc7466c 100644
--- a/src/OpenFOAM/primitives/bools/Switch/Switch.C
+++ b/src/OpenFOAM/primitives/bools/Switch/Switch.C
@@ -37,6 +37,7 @@ const char* Foam::Switch::names[Foam::Switch::INVALID+1] =
     "off",   "on",
     "no",    "yes",
     "n",     "y",
+    "f",     "t",
     "none",  "true",  // is there a reasonable counterpart to "none"?
     "invalid"
 };
@@ -54,18 +55,39 @@ Foam::Switch::switchType Foam::Switch::asEnum
     {
         if (str == names[sw])
         {
-            // convert n/y to no/yes - perhaps should deprecate y/n
-            if (sw == Switch::NO_1 || sw == Switch::NONE)
+            // handle aliases
+            switch (sw)
             {
-                return Switch::NO;
-            }
-            else if (sw == Switch::YES_1)
-            {
-                return Switch::YES;
-            }
-            else
-            {
-                return switchType(sw);
+                case Switch::NO_1:
+                case Switch::NONE:
+                {
+                    return Switch::NO;
+                    break;
+                }
+
+                case Switch::YES_1:
+                {
+                    return Switch::YES;
+                    break;
+                }
+
+                case Switch::FALSE_1:
+                {
+                    return Switch::FALSE;
+                    break;
+                }
+
+                case Switch::TRUE_1:
+                {
+                    return Switch::TRUE;
+                    break;
+                }
+
+                default:
+                {
+                    return switchType(sw);
+                    break;
+                }
             }
         }
     }
diff --git a/src/OpenFOAM/primitives/bools/Switch/Switch.H b/src/OpenFOAM/primitives/bools/Switch/Switch.H
index e68be1a2de8db66503617be0dcc6d2308dfcf3af..027d313a0aa68258c728359a1907e0863bb7e2fd 100644
--- a/src/OpenFOAM/primitives/bools/Switch/Switch.H
+++ b/src/OpenFOAM/primitives/bools/Switch/Switch.H
@@ -26,7 +26,7 @@ Class
 
 Description
     A simple wrapper around bool so that it can be read as a word:
-    true/false, on/off, yes/no or y/n or none.
+    true/false, on/off, yes/no, y/n, t/f, or none.
 
 SourceFiles
     Switch.C
@@ -78,6 +78,8 @@ public:
         #undef YES
         #undef NO_1
         #undef YES_1
+        #undef FALSE_1
+        #undef TRUE_1
         #undef NONE
         #undef PLACEHOLDER
         #undef INVALID
@@ -86,11 +88,12 @@ public:
         //  These also correspond to the entries in names.
         enum switchType
         {
-            FALSE = 0,  TRUE  = 1,
-            OFF   = 2,  ON    = 3,
-            NO    = 4,  YES   = 5,
-            NO_1  = 6,  YES_1 = 7,
-            NONE  = 8,  PLACEHOLDER = 9,
+            FALSE   = 0,  TRUE   = 1,
+            OFF     = 2,  ON     = 3,
+            NO      = 4,  YES    = 5,
+            NO_1    = 6,  YES_1  = 7,
+            FALSE_1 = 8,  TRUE_1 = 9,
+            NONE    = 10, PLACEHOLDER = 11,
             INVALID
         };