diff --git a/frustration.rs b/frustration.rs
index 634457e..437947f 100644
--- a/frustration.rs
+++ b/frustration.rs
@@ -61,25 +61,25 @@ const PRIMITIVES: [TableEntry; 24] = [
     TableEntry {f: lit     , name: None, immediate: false},
     TableEntry {f: add     , name: Some(ShortName {bytes: *b"+  ", length: 1}), immediate: false},
     TableEntry {f: call    , name: Some(ShortName {bytes: *b"cal", length: 4}), immediate: false},
-    TableEntry {f: comma_  , name: Some(ShortName {bytes: *b",  ", length: 1}), immediate: false},
-    TableEntry {f: create_ , name: Some(ShortName {bytes: *b"cre", length: 6}), immediate: false},
+    TableEntry {f: comma_d , name: Some(ShortName {bytes: *b",  ", length: 1}), immediate: false},
+    TableEntry {f: create_d, name: Some(ShortName {bytes: *b"cre", length: 6}), immediate: false},
     TableEntry {f: div     , name: Some(ShortName {bytes: *b"/  ", length: 1}), immediate: false},
     TableEntry {f: dot     , name: Some(ShortName {bytes: *b".  ", length: 1}), immediate: false},
     TableEntry {f: drop    , name: Some(ShortName {bytes: *b"dro", length: 4}), immediate: false},
     TableEntry {f: dup     , name: Some(ShortName {bytes: *b"dup", length: 3}), immediate: false},
     TableEntry {f: dump    , name: Some(ShortName {bytes: *b"dum", length: 4}), immediate: false},
-    TableEntry {f: from_r_ , name: Some(ShortName {bytes: *b"r> ", length: 2}), immediate: false},
+    TableEntry {f: from_r_d, name: Some(ShortName {bytes: *b"r> ", length: 2}), immediate: false},
     TableEntry {f: immediate,name: Some(ShortName {bytes: *b"imm", length: 9}), immediate: false},
     TableEntry {f: lbracket, name: Some(ShortName {bytes: *b"[  ", length: 1}), immediate: true},
     TableEntry {f: load    , name: Some(ShortName {bytes: *b"@  ", length: 1}), immediate: false},
     TableEntry {f: mul     , name: Some(ShortName {bytes: *b"*  ", length: 1}), immediate: false},
-    TableEntry {f: ret_    , name: Some(ShortName {bytes: *b"ret", length: 3}), immediate: false},
+    TableEntry {f: ret_d   , name: Some(ShortName {bytes: *b"ret", length: 3}), immediate: false},
     TableEntry {f: rbracket, name: Some(ShortName {bytes: *b"]  ", length: 1}), immediate: false},
     TableEntry {f: store   , name: Some(ShortName {bytes: *b"!  ", length: 1}), immediate: false},
     TableEntry {f: sub     , name: Some(ShortName {bytes: *b"-  ", length: 1}), immediate: false},
     TableEntry {f: swap    , name: Some(ShortName {bytes: *b"swa", length: 4}), immediate: false},
     TableEntry {f: tick    , name: Some(ShortName {bytes: *b"'  ", length: 1}), immediate: false},
-    TableEntry {f: to_r_ , name: Some(ShortName {bytes: *b">r ", length: 2}), immediate: false},
+    TableEntry {f: to_r_d  , name: Some(ShortName {bytes: *b">r ", length: 2}), immediate: false},
     TableEntry {f: word    , name: Some(ShortName {bytes: *b"wor", length: 4}), immediate: false}
 ];
 
@@ -105,7 +105,7 @@ fn create(c: &mut Core, name: ShortName) {
     c.here = (addr+6) as u16;
 }
 
-fn create_(c: &mut Core) {
+fn create_d(c: &mut Core) {
     match &c.next_token {
         Some(t) => {
             let short_name = truncate_name(t);
@@ -188,7 +188,7 @@ fn comma(c: &mut Core, val: u16) {
     c.here += 2;
 }
 
-fn comma_(c: &mut Core) {
+fn comma_d(c: &mut Core) {
     let val = pop(c);
     comma(c, val);
 }
@@ -246,7 +246,7 @@ fn to_r(c: &mut Core, val: u16) {
     c.trs += 1;
 }
 
-fn to_r_(c: &mut Core) {
+fn to_r_d(c: &mut Core) {
     let r1 = from_r(c);
     let r2 = pop(c);
     to_r(c, r2);
@@ -258,7 +258,7 @@ fn from_r(c: &mut Core) -> u16 {
     return c.rstack[c.trs];
 }
 
-fn from_r_(c: &mut Core) {
+fn from_r_d(c: &mut Core) {
     let r1 = from_r(c);
     let r2 = from_r(c);
     to_r(c, r1);
@@ -278,7 +278,7 @@ fn ret(c: &mut Core) {
     c.ip = from_r(c);
 }
 
-fn ret_(c: &mut Core) {
+fn ret_d(c: &mut Core) {
     _ = from_r(c);
     ret(c);
 }