diff --git a/aclocal.m4 b/aclocal.m4
index 995b19b33ff3e26a0bb37758b3e0b491f13f0cf4..1ba24b093e345e2f486a6421a43dad34eee33fac 100644
--- a/aclocal.m4
+++ b/aclocal.m4
@@ -28,11 +28,11 @@ AC_SUBST(ContextDiffCmd, [$fp_cv_context_diff])
 ])# FP_PROG_CONTEXT_DIFF
 
 
-# FP_ALTZONE
+# FP_DECL_ALTZONE
 # -------------------
 # Defines HAVE_DECL_ALTZONE to 1 if declared, 0 otherwise.
 # Used by base package.
-AC_DEFUN([FP_ALTZONE],
+AC_DEFUN([FP_DECL_ALTZONE],
 [AC_REQUIRE([AC_HEADER_TIME])dnl
 AC_CHECK_HEADERS([sys/time.h])
 AC_CHECK_DECLS([altzone], [], [],[#if TIME_WITH_SYS_TIME
@@ -45,7 +45,7 @@ AC_CHECK_DECLS([altzone], [], [],[#if TIME_WITH_SYS_TIME
 #  include <time.h>
 # endif
 #endif])
-])# FP_ALTZONE
+])# FP_DECL_ALTZONE
 
 
 # FP_COMPUTE_INT(EXPRESSION, VARIABLE, INCLUDES, IF-FAILS)
diff --git a/configure.ac b/configure.ac
index 5fb4686cba4e9ce0a174d18c4f851f182d788daa..bbda9299c41448a4e8e8b0e26e27607924ba8cee 100644
--- a/configure.ac
+++ b/configure.ac
@@ -838,7 +838,7 @@ dnl ** how do we get a timezone name, and UTC offset ?
 AC_STRUCT_TIMEZONE
 
 dnl ** do we have altzone?
-FP_ALTZONE
+FP_DECL_ALTZONE
 
 dnl ** does struct stat contain st_blksize?
 AC_STRUCT_ST_BLKSIZE