diff --git a/src/passport.a b/src/passport.a
index 2cea79c..3274323 100755
--- a/src/passport.a
+++ b/src/passport.a
@@ -802,7 +802,7 @@ _applyToAll
          !source "patchers/zoomgrafix.a"        ; gIsPhoenix only
          !source "patchers/e7everywhere.a"      ; gIsBoot0 || gIsProDOS only
          !source "patchers/choplifter.a"        ; gIsChoplifter only
-         !source "patchers/basham.a"            ; gIsDiversi only
+         !source "patchers/pdi.a"               ; gIsDiversi only
 
          lda   gPatchCount
          beq   .nopatches
diff --git a/src/patchers/basham.a b/src/patchers/pdi.a
similarity index 89%
rename from src/patchers/basham.a
rename to src/patchers/pdi.a
index 3816b5a..39d2717 100644
--- a/src/patchers/basham.a
+++ b/src/patchers/pdi.a
@@ -1,12 +1,14 @@
 ;-------------------------------
-; #BASHAM
+; #PDI
 ; obfuscated nibble check
-; used by Passport Systems
+; used by Passport Designs, Inc.
 ;
 ; tested on
 ; - Korg-800 4 Track Midi Sequencer
 ; - MIDI-8 Plus
 ; - Polywriter
+; - Leadsheeter
+; - Leadsheeter Utilities
 ;-------------------------------
 !zone {
          bit   gMode       ; nothing to do here in verify-only mode
@@ -24,7 +26,7 @@
          bcs   .exit
          sta   gDisplayBytes
          pha
-         lda   #s_basham
+         lda   #s_pdi
          jsr   PrintByID
          txa
          clc
diff --git a/src/strings/en.a b/src/strings/en.a
index 59705dd..1d61f0b 100755
--- a/src/strings/en.a
+++ b/src/strings/en.a
@@ -134,7 +134,7 @@ StringTableLow
          !byte <.diskvol0
          !byte <.e7everywhere
          !byte <.choplifter
-         !byte <.basham
+         !byte <.pdi
 
 StringTableHigh
          !byte >.header
@@ -255,7 +255,7 @@ StringTableHigh
          !byte >.diskvol0
          !byte >.e7everywhere
          !byte >.choplifter
-         !byte >.basham
+         !byte >.pdi
 
 ;
 ; Text can contain substitution strings, which
@@ -282,7 +282,7 @@ StringTableHigh
 ; can be set directly before calling PrintByID.
 ;
 .header
-         !text "Passport by 4am               2019-10-10",$00
+         !text "Passport by 4am               2019-11-15",$00
 .mainmenu
          !text "________________________________________",$8D,$8D,$8D,$8D,$8D,$8D,$8D,$8D
          !text "               "
@@ -609,6 +609,6 @@ StringTableHigh
          !text "T%t,S%0 Found E7 Everywhere protection",$8D,$00
 .choplifter
          !text "Roland was here, but he left...",$8D,$00
-.basham
-         !text "T%t,S%0 Found Basham protection",$8D,$00
+.pdi
+         !text "T%t,S%0 Found PDI protection check",$8D,$00
 }
diff --git a/src/strings/enid.a b/src/strings/enid.a
index 4abb353..d4c0a20 100644
--- a/src/strings/enid.a
+++ b/src/strings/enid.a
@@ -120,5 +120,5 @@ s_hoffman =    $72
 s_diskvol0 =   $73
 s_e7everywhere=$74
 s_choplifter = $75
-s_basham     = $76
+s_pdi        = $76
 STRINGCOUNT =  $77