diff --git a/configure.ac b/configure.ac
index cee319982f91827647be3fbb85e1d1559e4faa63..6162bc7c173ba2d913be3c447b729b0e37e1dd36 100644
--- a/configure.ac
+++ b/configure.ac
@@ -42,7 +42,7 @@ AC_PROG_CC
 AM_PROG_CC_C_O
 
 # If debug is selected then we also define SWIFT_DEVELOP_MODE to control
-# and developer code options.
+# any developer code options.
 if test "x$ax_enable_debug" != "xno"; then
    AC_DEFINE([SWIFT_DEVELOP_MODE],1,[Enable developer code options])
 fi