diff -Naurd mpfr-3.0.1-a/PATCHES mpfr-3.0.1-b/PATCHES
--- mpfr-3.0.1-a/PATCHES	2011-05-09 14:48:24.000000000 +0000
+++ mpfr-3.0.1-b/PATCHES	2011-05-09 14:48:24.000000000 +0000
@@ -0,0 +1 @@
+texp-zero
diff -Naurd mpfr-3.0.1-a/VERSION mpfr-3.0.1-b/VERSION
--- mpfr-3.0.1-a/VERSION	2011-05-05 00:00:35.000000000 +0000
+++ mpfr-3.0.1-b/VERSION	2011-05-09 14:48:24.000000000 +0000
@@ -1 +1 @@
-3.0.1-p3
+3.0.1-p4
diff -Naurd mpfr-3.0.1-a/mpfr.h mpfr-3.0.1-b/mpfr.h
--- mpfr-3.0.1-a/mpfr.h	2011-05-05 00:00:35.000000000 +0000
+++ mpfr-3.0.1-b/mpfr.h	2011-05-09 14:48:24.000000000 +0000
@@ -27,7 +27,7 @@
 #define MPFR_VERSION_MAJOR 3
 #define MPFR_VERSION_MINOR 0
 #define MPFR_VERSION_PATCHLEVEL 1
-#define MPFR_VERSION_STRING "3.0.1-p3"
+#define MPFR_VERSION_STRING "3.0.1-p4"
 
 /* Macros dealing with MPFR VERSION */
 #define MPFR_VERSION_NUM(a,b,c) (((a) << 16L) | ((b) << 8) | (c))
diff -Naurd mpfr-3.0.1-a/tests/texp.c mpfr-3.0.1-b/tests/texp.c
--- mpfr-3.0.1-a/tests/texp.c	2011-04-04 10:19:17.000000000 +0000
+++ mpfr-3.0.1-b/tests/texp.c	2011-05-09 14:48:24.000000000 +0000
@@ -170,7 +170,9 @@
       mpfr_set_prec (x, prec);
       mpfr_set_prec (y, prec);
       mpfr_set_prec (z, prec);
-      mpfr_urandomb (x, RANDS);
+      do
+        mpfr_urandomb (x, RANDS);
+      while (MPFR_IS_ZERO (x));  /* 0 is handled by mpfr_exp only */
       rnd = RND_RAND ();
       mpfr_exp_2 (y, x, rnd);
       mpfr_exp_3 (z, x, rnd);
diff -Naurd mpfr-3.0.1-a/version.c mpfr-3.0.1-b/version.c
--- mpfr-3.0.1-a/version.c	2011-05-05 00:00:35.000000000 +0000
+++ mpfr-3.0.1-b/version.c	2011-05-09 14:48:24.000000000 +0000
@@ -25,5 +25,5 @@
 const char *
 mpfr_get_version (void)
 {
-  return "3.0.1-p3";
+  return "3.0.1-p4";
 }