diff --git a/gdb/ChangeLog b/gdb/ChangeLog
index 3fa5738676a..464d412e21a 100644
--- a/gdb/ChangeLog
+++ b/gdb/ChangeLog
@@ -1,3 +1,8 @@
+2012-04-18  Tristan Gingold  <gingold@adacore.com>
+
+	* configure.ac (aix): Put -lpthread into libs.
+	* configure: Regenerate.
+
 2012-04-18  Tom Tromey  <tromey@redhat.com>
 
 	* linespec.c (convert_linespec_to_sals): Don't use
diff --git a/gdb/configure b/gdb/configure
index bb2d3c0e81e..60652d67eed 100755
--- a/gdb/configure
+++ b/gdb/configure
@@ -16221,7 +16221,7 @@ $as_echo "$gdb_cv_have_aix_thread_debug" >&6; }
       if test $gdb_cv_have_aix_thread_debug = yes; then
          CONFIG_SRCS="${CONFIG_SRCS} aix-thread.c"
          CONFIG_OBS="${CONFIG_OBS} aix-thread.o"
-         CONFIG_LDFLAGS="${CONFIG_LDFLAGS} -lpthdebug"
+         LIBS="$LIBS -lpthdebug"
 
          # Older versions of AIX do not provide the declaration for
          # the getthrds function (it appears that it was introduced
diff --git a/gdb/configure.ac b/gdb/configure.ac
index de500cc578d..03cd6665167 100644
--- a/gdb/configure.ac
+++ b/gdb/configure.ac
@@ -1682,7 +1682,7 @@ if test ${build} = ${host} -a ${host} = ${target} ; then
       if test $gdb_cv_have_aix_thread_debug = yes; then
          CONFIG_SRCS="${CONFIG_SRCS} aix-thread.c"
          CONFIG_OBS="${CONFIG_OBS} aix-thread.o"
-         CONFIG_LDFLAGS="${CONFIG_LDFLAGS} -lpthdebug"
+         LIBS="$LIBS -lpthdebug"
 
          # Older versions of AIX do not provide the declaration for
          # the getthrds function (it appears that it was introduced