diff --git a/libmicro-implicit-fortify-decl.patch b/libmicro-implicit-fortify-decl.patch
new file mode 100644
index 0000000..ab2ed5a
--- /dev/null
+++ b/libmicro-implicit-fortify-decl.patch
@@ -0,0 +1,36 @@
+Index: mmap.c
+===================================================================
+--- mmap.c.orig
++++ mmap.c
+@@ -32,6 +32,7 @@
+ #include <stdio.h>
+ #include <fcntl.h>
+ #include <strings.h>
++#include <string.h>
+ 
+ #include "libmicro.h"
+ 
+Index: mprotect.c
+===================================================================
+--- mprotect.c.orig
++++ mprotect.c
+@@ -34,6 +34,7 @@
+ #include <sys/mman.h>
+ #include <fcntl.h>
+ #include <strings.h>
++#include <string.h>
+ 
+ #include "libmicro.h"
+ 
+Index: munmap.c
+===================================================================
+--- munmap.c.orig
++++ munmap.c
+@@ -34,6 +34,7 @@
+ #include <sys/mman.h>
+ #include <fcntl.h>
+ #include <strings.h>
++#include <string.h>
+ 
+ #include "libmicro.h"
+ 
diff --git a/libmicro.changes b/libmicro.changes
index d4524db..92aabf1 100644
--- a/libmicro.changes
+++ b/libmicro.changes
@@ -3,6 +3,9 @@ Sat Jul  2 16:33:07 UTC 2016 - mpluskal@suse.com
 
 - Update to latest mercurial snapshot (4.2.2+hg.20120726)
   * lots of small changes
+- Build with optflags
+- Refresh patches
+- Add libmicro-implicit-fortify-decl.patch
 
 -------------------------------------------------------------------
 Sat Feb 14 17:04:27 UTC 2015 - mpluskal@suse.com
diff --git a/libmicro.spec b/libmicro.spec
index a9fa88f..426de8c 100644
--- a/libmicro.spec
+++ b/libmicro.spec
@@ -27,6 +27,7 @@ Source0:        %{name}-%{version}.tar.xz
 Patch0:         find_binary.patch
 Patch1:         removed_undefined_warning.patch
 Patch2:         fix-link.diff
+Patch3:         libmicro-implicit-fortify-decl.patch
 Requires:       gcc
 BuildRoot:      %{_tmppath}/%{name}-%{version}-build
 
@@ -40,9 +41,10 @@ performance of various system and library calls.
 %patch0
 %patch1
 %patch2
+%patch3
 
 %build
-make %{?_smp_mflags}
+make %{?_smp_mflags} CFLAGS="%{optflags}"
 
 %install
 rm bin-*/*.a