diff --git a/configure b/configure
index 36af89eb0227..c5b795f4914f 100755
--- a/configure
+++ b/configure
@@ -1,5 +1,5 @@
 #! /bin/sh
-# From configure.in Revision: 42563 .
+# From configure.in Revision: 43158 .
 # Guess values for system-dependent variables and create Makefiles.
 # Generated by GNU Autoconf 2.59 for python 2.5.
 #
@@ -3882,6 +3882,9 @@ echo "${ECHO_T}$ac_cv_no_strict_aliasing_ok" >&6
 	Darwin*)
 	    BASECFLAGS="$BASECFLAGS -Wno-long-double -no-cpp-precomp -mno-fused-madd"
 	    ;;
+	OSF*)
+	    BASECFLAGS="$BASECFLAGS -mieee"
+	    ;;
     esac
     ;;
 
diff --git a/configure.in b/configure.in
index 5d9ec5633c87..8a73c4fdd331 100644
--- a/configure.in
+++ b/configure.in
@@ -746,6 +746,9 @@ yes)
 	Darwin*)
 	    BASECFLAGS="$BASECFLAGS -Wno-long-double -no-cpp-precomp -mno-fused-madd"
 	    ;;
+	OSF*)
+	    BASECFLAGS="$BASECFLAGS -mieee"
+	    ;;
     esac
     ;;