diff --git a/configure.ac b/configure.ac
index acdd120..fd8497c 100644
--- a/configure.ac
+++ b/configure.ac
@@ -15,9 +15,8 @@ AC_CONFIG_AUX_DIR([libltdl/config])
 AM_INIT_AUTOMAKE([-Wall -Werror foreign])
 
 AM_PROG_LIBTOOL
-#fix for automake 1.12
-m4_pattern_allow([AM_PROG_AR])
-AM_PROG_AR
+# fix for automake 1.11 & 1.12
+m4_ifdef([AM_PROG_AR], [AM_PROG_AR]) 
 
 LDFLAGS="$LDFLAGS -version-info 0:8:0"
 
diff --git a/libmbus.spec b/libmbus.spec
new file mode 100644
index 0000000..c126b4d
--- /dev/null
+++ b/libmbus.spec
@@ -0,0 +1,84 @@
+#
+# spec file for package libmbus
+#
+# Copyright (c) 2010-2013, Raditex Control AB
+# All rights reserved.
+#
+# rSCADA 
+# http://www.rSCADA.se
+# info@rscada.se
+#
+
+Summary: 	Open source M-bus (Meter-Bus) library
+Name: 		libmbus
+Version: 	0.8.0
+Release: 	1
+Source:	 	http://www.rscada.se/public-dist/%{name}-%{version}.tar.gz
+URL:		http://www.rscada.se/libmbus/
+License:	BSD
+Vendor:		Raditex Control AB
+Packager:	Stefan Wahren <info@lategoodbye.de>
+Group: 		Development/Languages/C and C++ 
+BuildRoot: 	{_tmppath}/%{name}-%{version}-build
+AutoReqProv:	on 
+
+%description
+libmbus: M-bus Library from Raditex Control (http://www.rscada.se)
+
+libmbus is an open source library for the M-bus (Meter-Bus) protocol. 
+The Meter-Bus is a standard for reading out meter data from electricity meters, 
+heat meters, gas meters, etc. The M-bus standard deals with both the electrical
+signals on the M-Bus, and the protocol and data format used in transmissions 
+on the M-Bus. The role of libmbus is to decode/encode M-bus data, and to handle
+the communication with M-Bus devices.
+
+For more information see http://www.rscada.se/libmbus
+
+%package devel
+License:        BSD
+Summary:        Development libraries and header files for using the M-bus library
+Group:          Development/Libraries/C and C++
+AutoReqProv:    on
+Requires:       %{name} = %{version}
+
+%description devel
+This package contains all necessary include files and libraries needed
+to compile and link applications which use the M-bus (Meter-Bus) library.
+
+%prep -q
+%setup -q
+# workaround to get it's build
+autoreconf
+
+%build
+./configure --prefix=/usr
+make
+
+%install
+rm -Rf "%buildroot"
+mkdir "%buildroot"
+make install DESTDIR="%buildroot"
+
+%clean
+rm -rf "%buildroot"
+
+%files
+%defattr (-,root,root)
+%doc COPYING README
+%{_bindir}/mbus-serial-*
+%{_bindir}/mbus-tcp-*
+%{_libdir}/libmbus.so*
+# man pages doesn't exist in this version
+# %{_mandir}/man1/libmbus.1
+# %{_mandir}/man1/mbus-*
+
+%files devel
+%defattr (-,root,root)
+%{_includedir}/mbus
+%{_libdir}/libmbus.a
+%{_libdir}/libmbus.la
+%{_libdir}/pkgconfig/libmbus.pc
+
+%changelog
+* Fri Mar 29 2013 Stefan Wahren <info@lategoodbye.de> - 0.8.0-1
+- Initial package based on the last official release
\ No newline at end of file
diff --git a/mbus/mbus-protocol-aux.c b/mbus/mbus-protocol-aux.c
index 0480930..b09a643 100755
--- a/mbus/mbus-protocol-aux.c
+++ b/mbus/mbus-protocol-aux.c
@@ -1146,6 +1146,13 @@ mbus_parse_fixed_record(char status_byte, char medium_unit, u_char *data)
 
     /* shared/static memory - get own copy */
     record->function_medium = strdup(mbus_data_fixed_function((int)status_byte));  /* stored / actual */
+    
+    if (record->function_medium == NULL)
+    {
+        MBUS_ERROR("%s: memory allocation error\n", __PRETTY_FUNCTION__);
+        mbus_record_free(record);
+        return NULL;
+    }
 
     long value = 0;
     if ((status_byte & MBUS_DATA_FIXED_STATUS_FORMAT_MASK) == MBUS_DATA_FIXED_STATUS_FORMAT_BCD)
@@ -1202,6 +1209,13 @@ mbus_parse_variable_record(mbus_data_record *data)
         {
             record->function_medium = strdup("Manufacturer specific");
         }
+        
+        if (record->function_medium == NULL)
+        {
+            MBUS_ERROR("%s: memory allocation error\n", __PRETTY_FUNCTION__);
+            mbus_record_free(record);
+            return NULL;
+        }
     
         /* parsing of data not implemented yet
            manufacturer specific data structures to end of user data */
@@ -1228,6 +1242,14 @@ mbus_parse_variable_record(mbus_data_record *data)
     else
     {
         record->function_medium = strdup(mbus_data_record_function(data));
+        
+        if (record->function_medium == NULL)
+        {
+            MBUS_ERROR("%s: memory allocation error\n", __PRETTY_FUNCTION__);
+            mbus_record_free(record);
+            return NULL;
+        }
+        
         MBUS_DEBUG("record->function_medium = %s \n", record->function_medium);     
 
         if (mbus_variable_value_decode(data, &value_out_real, &value_out_str, &value_out_str_size) != 0)
diff --git a/mbus/mbus-protocol.c b/mbus/mbus-protocol.c
index 88cf474..b7d16f7 100755
--- a/mbus/mbus-protocol.c
+++ b/mbus/mbus-protocol.c
@@ -3827,6 +3827,10 @@ mbus_frame_data_new()
     {
         return NULL;
     }
+    
+    memset(data, 0, sizeof(mbus_frame_data));
+    
+    data->data_var.data = NULL;
     data->data_var.record = NULL;
 
     return data;