diff --git a/doc/pcre2api.3 b/doc/pcre2api.3
index 68deb78..653a651 100644
--- a/doc/pcre2api.3
+++ b/doc/pcre2api.3
@@ -3463,7 +3463,7 @@ capture groups and letters within \eQ...\eE quoted sequences.
 Note that case forcing sequences such as \eU...\eE do not nest. For example,
 the result of processing "\eUaa\eLBB\eEcc\eE" is "AAbbcc"; the final \eE has no
 effect. Note also that the PCRE2_ALT_BSUX and PCRE2_EXTRA_ALT_BSUX options do
-not apply to not apply to replacement strings.
+not apply to replacement strings.
 .P
 The second effect of setting PCRE2_SUBSTITUTE_EXTENDED is to add more
 flexibility to capture group substitution. The syntax is similar to that used