diff --git a/libguile-2.0.11-arm-asm.patch b/libguile-2.0.11-arm-asm.patch
new file mode 100644
index 0000000..e87691d
--- /dev/null
+++ b/libguile-2.0.11-arm-asm.patch
@@ -0,0 +1,11 @@
+--- guile-2.0.11/libguile/vm-i-scheme.c.orig	2016-05-16 11:11:30.490598931 +0200
++++ guile-2.0.11/libguile/vm-i-scheme.c	2016-05-16 11:12:00.738677032 +0200
+@@ -363,7 +363,7 @@
+       {									\
+ 	scm_t_signed_bits rlo, rhi;					\
+ 	asm ("smull %0, %1, %2, %3\n"					\
+-	     : "=r" (rlo), "=r" (rhi)					\
++	     : "=&r" (rlo), "=&r" (rhi)					\
+ 	     : "r" (SCM_UNPACK (x) - scm_tc2_int),			\
+ 	       "r" (SCM_I_INUM (y)));					\
+ 	if (SCM_LIKELY (SCM_SRS (rlo, 31) == rhi))			\
diff --git a/libguile.spec b/libguile.spec
index 40660af..edf9215 100644
--- a/libguile.spec
+++ b/libguile.spec
@@ -1,7 +1,7 @@
 %define majversion %(echo %version | cut -d. -f 1-2)
 Name:          libguile
 Version:       2.0.11
-Release:       2mamba
+Release:       3mamba
 Summary:       A GNU implementation of Scheme for application extensibility
 Group:         Development/Applications
 Vendor:        openmamba
@@ -9,6 +9,7 @@ Distribution:  openmamba
 Packager:      Silvan Calarco <silvan.calarco@mambasoft.it>
 URL:           http://www.gnu.org/software/guile/guile.html
 Source:        http://ftp.gnu.org/gnu/guile/guile-%{version}.tar.xz
+Patch0:        libguile-2.0.11-arm-asm.patch
 License:       LGPL
 BuildRoot:     %{_tmppath}/%{name}-%{version}-root
 ## AUTOBUILDREQ-BEGIN
@@ -21,6 +22,7 @@ BuildRequires: libncurses-devel
 BuildRequires: libreadline-devel
 BuildRequires: libunistring-devel
 ## AUTOBUILDREQ-END
+BuildRequires: libunistring-devel >= 0.9.6-1mamba
 BuildRequires: pkg-config
 BuildRequires: slib >= 3b3
 Requires(post):%{__install_info}
@@ -50,12 +52,17 @@ You'll also need to install the guile package.
 
 %prep
 %setup -q -n guile-%{version}
-#-D -T
+%ifarch arm
+%patch0 -p1
+%endif
 
 %build
 #:<< _EOF
 %configure \
-   --with-threads
+   --with-threads \
+%ifarch arm
+   CFLAGS="%{optflags} -O1
+%endif
 
 %make scmconfig.h \
    -j1 \
@@ -171,6 +178,9 @@ done
 #%doc ChangeLog GUILE-VERSION HACKING NEWS.bz2 README
 
 %changelog
+* Sun May 15 2016 Silvan Calarco <silvan.calarco@mambasoft.it> 2.0.11-3mamba
+- rebuilt by autoport with build requirements: libunistring-devel>=0.9.6-1mamba
+
 * Mon Apr 21 2014 Silvan Calarco <silvan.calarco@mambasoft.it> 2.0.11-2mamba
 - move gdb .scm debug file from %_libdir to gdb auto-loaddir and put it in new -debug package