diff --git a/src/pcre2posix.c b/src/pcre2posix.c
index e7cf9c2..4ecc701 100644
--- a/src/pcre2posix.c
+++ b/src/pcre2posix.c
@@ -286,8 +286,7 @@ return 0;
 
 /* A suitable match_data block, large enough to hold all possible captures, was
 obtained when the pattern was compiled, to save having to allocate and free it
-for each match. If REG_NOSUB was specified at compile time, the
-PCRE_NO_AUTO_CAPTURE flag will be set. When this is the case, the nmatch and
+for each match. If REG_NOSUB was specified at compile time, the nmatch and
 pmatch arguments are ignored, and the only result is yes/no/error. */
 
 PCRE2POSIX_EXP_DEFN int PCRE2_CALL_CONVENTION
diff --git a/src/pcre2posix.h b/src/pcre2posix.h
index 5f2906a..6505976 100644
--- a/src/pcre2posix.h
+++ b/src/pcre2posix.h
@@ -56,7 +56,7 @@ extern "C" {
 #define REG_NOTBOL    0x0004  /* Maps to PCRE2_NOTBOL */
 #define REG_NOTEOL    0x0008  /* Maps to PCRE2_NOTEOL */
 #define REG_DOTALL    0x0010  /* NOT defined by POSIX; maps to PCRE2_DOTALL */
-#define REG_NOSUB     0x0020  /* Maps to PCRE2_NO_AUTO_CAPTURE */
+#define REG_NOSUB     0x0020  /* Do not report what was matched */
 #define REG_UTF       0x0040  /* NOT defined by POSIX; maps to PCRE2_UTF */
 #define REG_STARTEND  0x0080  /* BSD feature: pass subject string by so,eo */
 #define REG_NOTEMPTY  0x0100  /* NOT defined by POSIX; maps to PCRE2_NOTEMPTY */