diff --git a/configure b/configure
index 0edb145378..976527f5e3 100755
--- a/configure
+++ b/configure
@@ -19187,8 +19187,9 @@ ac_compiler_gnu=$ac_cv_c_compiler_gnu
 
 	# set thread flags
 
-# Some platforms use these, so just defineed them.  They can't hurt if they
-# are not supported.
+# Some platforms use these, so just define them.  They can't hurt if they
+# are not supported.  For example, on Solaris -D_POSIX_PTHREAD_SEMANTICS
+# enables 5-arg getpwuid_r, among other things.
 PTHREAD_CFLAGS="$PTHREAD_CFLAGS -D_REENTRANT -D_THREAD_SAFE -D_POSIX_PTHREAD_SEMANTICS"
 
 
diff --git a/configure.in b/configure.in
index 073bfa855e..e148441982 100644
--- a/configure.in
+++ b/configure.in
@@ -1,5 +1,5 @@
 dnl Process this file with autoconf to produce a configure script.
-dnl $PostgreSQL: pgsql/configure.in,v 1.569 2008/10/29 16:06:46 petere Exp $
+dnl $PostgreSQL: pgsql/configure.in,v 1.570 2008/10/29 16:23:07 petere Exp $
 dnl
 dnl Developers, please strive to achieve this order:
 dnl
@@ -1334,8 +1334,9 @@ esac
 if test "$enable_thread_safety" = yes -a "$PORTNAME" != "win32"; then
 ACX_PTHREAD	# set thread flags
 
-# Some platforms use these, so just defineed them.  They can't hurt if they
-# are not supported.
+# Some platforms use these, so just define them.  They can't hurt if they
+# are not supported.  For example, on Solaris -D_POSIX_PTHREAD_SEMANTICS
+# enables 5-arg getpwuid_r, among other things.
 PTHREAD_CFLAGS="$PTHREAD_CFLAGS -D_REENTRANT -D_THREAD_SAFE -D_POSIX_PTHREAD_SEMANTICS"
 
 
diff --git a/src/template/solaris b/src/template/solaris
index 40e3a68c88..e07b9a0a8d 100644
--- a/src/template/solaris
+++ b/src/template/solaris
@@ -20,5 +20,3 @@ if test "$SUN_STUDIO_CC" = yes ; then
     ;;
   esac
 fi
-
-# -D_POSIX_PTHREAD_SEMANTICS enables 5-arg getpwuid_r, among other things