diff --git a/gawk-3.1.5-numflags.patch b/gawk-3.1.5-numflags.patch
new file mode 100644
index 0000000..a0ada4b
--- /dev/null
+++ b/gawk-3.1.5-numflags.patch
@@ -0,0 +1,16 @@
+Tue Jul  4 22:43:05 2006  Arnold D. Robbins  <arnold@skeeve.com>
+
+    * eval.c (interpret): Node_assign_concat case: Turn off NUMBER and NUMCUR
+    flags in result.  Sheesh. Thanks to <Heiner.Marxen@DrB.Insel.DE> for finding
+    the problem.
+
+--- gawk-3.1.5/eval.c.numflags	2006-07-10 09:36:26.000000000 +0200
++++ gawk-3.1.5/eval.c	2006-07-10 09:36:41.000000000 +0200
+@@ -1193,6 +1193,7 @@
+ 			unref(*lhs);
+ 			*lhs = make_str_node(nval, l->stlen + r->stlen, ALREADY_MALLOCED);
+ 		}
++		(*lhs)->flags &= ~(NUMCUR|NUMBER);
+ 		free_temp(r);
+ 
+ 		if (after_assign)
diff --git a/gawk.spec b/gawk.spec
index 5232eff..8f20163 100644
--- a/gawk.spec
+++ b/gawk.spec
@@ -1,7 +1,7 @@
 Summary: The GNU version of the awk text processing utility.
 Name: gawk
 Version: 3.1.5
-Release: 8
+Release: 9
 License: GPL
 Group: Applications/Text
 Source0: ftp://ftp.gnu.org/gnu/gawk/gawk-%{version}.tar.bz2
@@ -23,6 +23,8 @@ Patch6: gawk-3.1.5-wconcat.patch
 Patch7: gawk-3.1.5-internal.patch
 # 194214 - gawk coredumps on syntax error
 Patch8: gawk-3.1.5-syntaxerror.patch
+# http://lists.gnu.org/archive/html/bug-gnu-utils/2006-07/msg00004.html
+Patch9: gawk-3.1.5-numflags.patch
 
 %description
 The gawk packages contains the GNU version of awk, a text processing
@@ -90,6 +92,10 @@ fi
 %{_datadir}/awk
 
 %changelog
+* Mon Jul 10 2006 Karel Zak <kzak@redhat.com> 3.1.5-9
+- fix numeric conversion problem (patch by Aharon Robbins)
+  http://lists.gnu.org/archive/html/bug-gnu-utils/2006-07/msg00004.html
+
 * Fri Jun 23 2006 Karel Zak <kzak@redhat.com> 3.1.5-8
 - fix #194214 - gawk coredumps on syntax error (patch by Aharon Robbins)