diff --git a/gawk-3.1.5-free.patch b/gawk-3.1.5-free.patch
new file mode 100644
index 0000000..d721d59
--- /dev/null
+++ b/gawk-3.1.5-free.patch
@@ -0,0 +1,35 @@
+--- gawk-3.1.5/io.c.free	2005-09-27 19:21:05.000000000 +0200
++++ gawk-3.1.5/io.c	2005-09-27 19:22:58.000000000 +0200
+@@ -2479,9 +2479,12 @@
+ {
+ 	struct stat sbuf;
+ 	struct open_hook *oh;
++	int iop_malloced = FALSE;
+ 
+-	if (iop == NULL)
++	if (iop == NULL) {
+ 		emalloc(iop, IOBUF *, sizeof(IOBUF), "iop_alloc");
++		iop_malloced = TRUE;
++	}
+ 	memset(iop, '\0', sizeof(IOBUF));
+ 	iop->flag = 0;
+ 	iop->fd = fd;
+@@ -2494,7 +2497,8 @@
+ 	}
+ 
+ 	if (iop->fd == INVALID_HANDLE) {
+-		free(iop);
++		if (iop_malloced)
++			free(iop);
+ 		return NULL;
+ 	}
+ 	if (isatty(iop->fd))
+@@ -2502,7 +2506,7 @@
+ 	iop->readsize = iop->size = optimal_bufsize(iop->fd, & sbuf);
+ 	iop->sbuf = sbuf;
+ 	if (do_lint && S_ISREG(sbuf.st_mode) && sbuf.st_size == 0)
+-			lintwarn(_("data file `%s' is empty"), name);
++		lintwarn(_("data file `%s' is empty"), name);
+ 	errno = 0;
+ 	iop->count = iop->scanoff = 0;
+ 	emalloc(iop->buf, char *, iop->size += 2, "iop_alloc");
diff --git a/gawk.spec b/gawk.spec
index 4ff8f5d..2f770eb 100644
--- a/gawk.spec
+++ b/gawk.spec
@@ -1,12 +1,13 @@
 Summary: The GNU version of the awk text processing utility.
 Name: gawk
 Version: 3.1.5
-Release: 2
+Release: 3
 License: GPL
 Group: Applications/Text
 Source0: ftp://ftp.gnu.org/gnu/gawk/gawk-%{version}.tar.bz2
 Source1: ftp://ftp.gnu.org/gnu/gawk/gawk-%{version}-ps.tar.gz
 Patch1: gawk-3.1.3-getpgrp_void.patch
+Patch2: gawk-3.1.5-free.patch
 Prereq: /sbin/install-info
 Requires: /bin/mktemp
 Buildroot: %{_tmppath}/%{name}-root
@@ -22,6 +23,7 @@ considered to be a standard Linux tool for processing text.
 %prep
 %setup -q -b 1
 %patch1 -p1 -b .getpgrp_void
+%patch2 -p1 -b .free
 
 %build
 %configure
@@ -70,6 +72,9 @@ fi
 %{_datadir}/awk
 
 %changelog
+* Tue Sep 27 2005 Karel Zak <kzak@redhat.com> 3.1.5-3
+- fix #169374 - Invalid Free (patch by Aharon Robbins)
+
 * Tue Sep 20 2005 Karel Zak <kzak@redhat.com> 3.1.5-2
 - fix #167181 - gawk owns /usr/share
 - fix #160634 - should exclude dirs in spec file