diff --git a/ChangeLog b/ChangeLog
index ca793e6..2796327 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -131,6 +131,8 @@ pattern is set up so as to initialize any padding the compiler might have
 included. This avoids valgrind warnings when a compiled pattern is copied, in 
 particular when it is serialized.
 
+24. Remove a redundant line of code left in accidentally a long time ago.
+
 
 Version 10.23 14-February-2017
 ------------------------------
diff --git a/src/pcre2_compile.c b/src/pcre2_compile.c
index 0c46b52..9ce3dee 100644
--- a/src/pcre2_compile.c
+++ b/src/pcre2_compile.c
@@ -7200,7 +7200,6 @@ for (;; pptr++)
 
       if (mclength == 1 || req_caseopt == 0)
         {
-        firstcu = mcbuffer[0] | req_caseopt;
         firstcu = mcbuffer[0];
         firstcuflags = req_caseopt;
         if (mclength != 1)