diff --git a/libkolabxml.spec b/libkolabxml.spec
index e3be77d..be93002 100644
--- a/libkolabxml.spec
+++ b/libkolabxml.spec
@@ -194,6 +194,7 @@ sed -i "s/-php/-php7/g" src/php/CMakeLists.txt
 mkdir -p \
     %{buildroot}/%{_datadir}/php \
     %{buildroot}/%{php_inidir}/
+rm -f %{buildroot}/%{php_extdir}/kolabformat.php
 cat > %{buildroot}/%{php_inidir}/%{ini_name} << EOF
 extension=kolabformat.so
 EOF