diff --git a/x11vnc.spec b/x11vnc.spec
index bcb9015..90dc6ab 100644
--- a/x11vnc.spec
+++ b/x11vnc.spec
@@ -1,6 +1,6 @@
 Name:          x11vnc
 Version:       0.9.16
-Release:       1mamba
+Release:       2mamba
 Summary:       LibVNCServer is ripped out of Xvnc to provide an easy API to write one's own vnc server
 Group:         System/Libraries
 Vendor:        openmamba
@@ -12,20 +12,22 @@ Patch0:        %{name}-0.9.10-fix_redeclared_pointer.patch
 License:       GPL
 ## AUTOBUILDREQ-BEGIN
 BuildRequires: glibc-devel
-%if "%{stage1}" != "1"
-BuildRequires: libavahi-devel
-%endif
-BuildRequires: libjpeg-devel
-BuildRequires: libopenssl-devel
-BuildRequires: libvncserver-devel
+BuildRequires: ldconfig
 BuildRequires: libX11-devel
+BuildRequires: libXcomposite-devel
+BuildRequires: libXcursor-devel
 BuildRequires: libXdamage-devel
 BuildRequires: libXext-devel
 BuildRequires: libXfixes-devel
+BuildRequires: libXi-devel
 BuildRequires: libXinerama-devel
 BuildRequires: libXrandr-devel
 BuildRequires: libXtst-devel
-BuildRequires: libz-devel
+BuildRequires: libavahi-devel
+BuildRequires: libcairo-devel
+BuildRequires: libnsl-devel
+BuildRequires: libopenssl-devel
+BuildRequires: libvncserver-devel
 ## AUTOBUILDREQ-END
 BuildRoot:     %{_tmppath}/%{name}-%{version}-root
 
@@ -39,16 +41,20 @@ Requires:      %{name} = %{?epoch:%epoch:}%{version}-%{release}
 
 %description devel
 LibVNCServer is ripped out of Xvnc to provide an easy API to write one's own vnc server.
-This package contains static libraries and header files need for development.
+This package contains static libraries and header files needed for development.
+
+%debug_package
 
 %prep
 %setup -q
 #%patch0 -p1
+./autogen.sh
 
 %build
-./autogen.sh
 %configure \
-   --with-system-libvncserver
+   --with-system-libvncserver \
+   CFLAGS="%{optflags} -fcommon"
+
 %make
 
 %install
@@ -70,6 +76,9 @@ This package contains static libraries and header files need for development.
 %doc AUTHORS COPYING ChangeLog NEWS README
 
 %changelog
+* Tue Dec 29 2020 Silvan Calarco <silvan.calarco@mambasoft.it> 0.9.16-2mamba
+- rebuilt with debug package and -fcommon
+
 * Sun Jan 13 2019 Automatic Build System <autodist@mambasoft.it> 0.9.16-1mamba
 - automatic version update by autodist