diff --git a/0004-modify-my_strncat-function.patch b/0004-modify-my_strncat-function.patch
new file mode 100644
index 0000000000000000000000000000000000000000..4bfd5db83051bec6040f453304dd60aa27aa3c4b
--- /dev/null
+++ b/0004-modify-my_strncat-function.patch
@@ -0,0 +1,15 @@
+diff --git a/lib/sysfs_utils.c b/lib/sysfs_utils.c
+index 46e0849..c0176d1 100644
+--- a/lib/sysfs_utils.c
++++ b/lib/sysfs_utils.c
+@@ -375,8 +375,8 @@ char *my_strncat(char *to, const char *from, size_t max)
+ {
+ 	size_t i = 0;
+ 
+-	while (i < max && to[i] != '\0')
++	while (to[i] != '\0')
+ 		i++;
+-	my_strncpy(to+i, from, max-i);
++	my_strncpy(to+i, from, max);
+ 	return to;
+ }
diff --git a/sysfsutils.spec b/sysfsutils.spec
index a02f4b0f66d2d96c66039908f48337748d808b70..96345440922e206fd98db380106d8df2d4a78363 100644
--- a/sysfsutils.spec
+++ b/sysfsutils.spec
@@ -10,6 +10,7 @@ Source0:     https://github.com/linux-ras/sysfsutils/archive/v%{version}.tar.gz
 Patch1:      0001-lib-Fixed-a-memory-leak-in-lib-sysfs_driver.patch
 Patch2:      0002-lib-Fixed-memory-leaks-in-lib-sysfs_device.c.patch
 Patch3:      0003-lib-Fixed-memory-leaks-in-lib-sysfs_attr.c.patch
+Patch4:      0004-modify-my_strncat-function.patch
 
 BuildRequires: gcc chrpath autoconf automake make libtool
 Provides:      libsysfs libsysfs%{?_isa}