diff --git a/lib/ft8/chkcrc12a.f90 b/lib/ft8/chkcrc12a.f90
index e994650..3ef8e4a 100644
--- a/lib/ft8/chkcrc12a.f90
+++ b/lib/ft8/chkcrc12a.f90
@@ -16,7 +16,7 @@ subroutine chkcrc12a(decoded,nbadcrc)
   i1Dec8BitBytes(10)=iand(i1Dec8BitBytes(10),128+64+32)
   i1Dec8BitBytes(11)=0
   icrc12=crc12(c_loc(i1Dec8BitBytes),11)          !CRC12 computed from 75 msg bits
-  icrc12=xor(icrc12, 42)
+  icrc12=xor(icrc12, 41)
 
   nbadcrc=1
   if(ncrc12.eq.icrc12) nbadcrc=0
diff --git a/lib/ft8/extractmessage174.f90 b/lib/ft8/extractmessage174.f90
index 361a9a6..c07c943 100644
--- a/lib/ft8/extractmessage174.f90
+++ b/lib/ft8/extractmessage174.f90
@@ -22,7 +22,7 @@ subroutine extractmessage174(decoded,msgreceived,ncrcflag)
   i1Dec8BitBytes(10)=iand(i1Dec8BitBytes(10),128+64+32)
   i1Dec8BitBytes(11)=0
   icrc12=crc12(c_loc(i1Dec8BitBytes),11)          !CRC12 computed from 75 msg bits
-  icrc12=xor(icrc12, 42)
+  icrc12=xor(icrc12, 41)
 
   if(ncrc12.eq.icrc12 .or. sum(decoded(57:87)).eq.0) then  !### Kludge ###
 ! CRC12 checks out --- unpack 72-bit message
diff --git a/lib/ft8/foxgen.f90 b/lib/ft8/foxgen.f90
index e3b2e17..7f1e92c 100644
--- a/lib/ft8/foxgen.f90
+++ b/lib/ft8/foxgen.f90
@@ -73,7 +73,7 @@ subroutine foxgen()
         read(cb88,1003) i1Msg8BitBytes(1:11)
 1003    format(11b8)
         icrc12=crc12(c_loc(i1Msg8BitBytes),11)
-        icrc12=xor(icrc12, 42)
+        icrc12=xor(icrc12, 41)
 
         write(cbits,1001) msgbits(1:56),icrc10,nrpt,i3b,icrc12
         read(cbits,1002) msgbits
diff --git a/lib/ft8/genft8.f90 b/lib/ft8/genft8.f90
index ccd561b..52dfcc9 100644
--- a/lib/ft8/genft8.f90
+++ b/lib/ft8/genft8.f90
@@ -38,7 +38,7 @@ subroutine genft8(msg,mygrid,bcontest,i3bit,msgsent,msgbits,itone)
   i1Msg8BitBytes(10)=iand(i1Msg8BitBytes(10),128+64+32)
   i1Msg8BitBytes(11)=0
   icrc12=crc12(c_loc(i1Msg8BitBytes),11)
-  icrc12=xor(icrc12, 42)
+  icrc12=xor(icrc12, 41)
 
 ! For reference, here's how to check the CRC
 !  i1Msg8BitBytes(10)=icrc12/256
diff --git a/lib/ft8/ldpcsim174.f90 b/lib/ft8/ldpcsim174.f90
index a6ff941..e5d0420 100644
--- a/lib/ft8/ldpcsim174.f90
+++ b/lib/ft8/ldpcsim174.f90
@@ -91,7 +91,7 @@ allocate ( rxdata(N), llr(N) )
 
   i1Msg8BitBytes(10:11)=0
   checksum = crc12 (c_loc (i1Msg8BitBytes), 11)
-  checksum = xor(checksum, 42)
+  checksum = xor(checksum, 41)
 ! For reference, the next 3 lines show how to check the CRC
   i1Msg8BitBytes(10)=checksum/256
   i1Msg8BitBytes(11)=iand (checksum,255)