diff --git a/src/pcre2test.c b/src/pcre2test.c
index 3a06074..a556a7a 100644
--- a/src/pcre2test.c
+++ b/src/pcre2test.c
@@ -587,7 +587,7 @@ static modstruct modlist[] = {
   PCRE2_UCP|PCRE2_UTF|PCRE2_UNGREEDY)
 
 #define POSIX_SUPPORTED_COMPILE_CONTROLS ( \
-  CTL_AFTERTEXT|CTL_ALLAFTERTEXT|CTL_POSIX)
+  CTL_AFTERTEXT|CTL_ALLAFTERTEXT|CTL_EXPAND|CTL_POSIX)
 
 #define POSIX_SUPPORTED_MATCH_OPTIONS ( \
   PCRE2_NOTBOL|PCRE2_NOTEMPTY|PCRE2_NOTEOL)