diff --git a/datovka.spec b/datovka.spec
index befa95e..4505057 100644
--- a/datovka.spec
+++ b/datovka.spec
@@ -38,8 +38,6 @@ Source1:        https://secure.nic.cz/files/datove_schranky/%{version}/%{name}-%
 # PATCH-FIX-UPSTREAM: remove some issues with current .pro file
 Patch0:         datovka-fix-pro.patch
 %if 0%{qt_version} == 6
-# private-devel is only temporary to fix "Library 'libatomic' is not defined."
-BuildRequires:  qt6-core-private-devel
 BuildRequires:  qt6-tools-linguist
 %else
 BuildRequires:  libqt5-linguist
@@ -91,7 +89,9 @@ export CXXFLAGS="-std=c++11 %{optflags}"
 %endif
 %{lrelease} datovka.pro
 %if 0%{qt_version} == 6
-%qmake6 PREFIX=%{_prefix} DISABLE_VERSION_CHECK_BY_DEFAULT=1
+# QMAKE_LIBS_LIBATOMIC= is only temporary to fix:
+# "Library 'libatomic' is not defined."
+%qmake6 PREFIX=%{_prefix} DISABLE_VERSION_CHECK_BY_DEFAULT=1 QMAKE_LIBS_LIBATOMIC=
 %qmake6_build
 %else
 %qmake5 PREFIX=%{_prefix} DISABLE_VERSION_CHECK_BY_DEFAULT=1