diff --git a/marble.spec b/marble.spec
index 1d08d98..2442379 100644
--- a/marble.spec
+++ b/marble.spec
@@ -15,7 +15,7 @@
 # Please submit bugfixes or comments via http://bugs.opensuse.org/
 #
 
-%define _so 22
+%define _so -22
 
 Name:           marble
 Version:        15.07.90
@@ -58,7 +58,7 @@ BuildRequires:  krunner-devel
 BuildRequires:  perl
 BuildRequires:  libquazip-qt5-devel
 Requires:       %{name}-data = %{version}
-Requires:       libastro2 = %{version}
+Requires:       libastro1 = %{version}
 Requires:       libmarblewidget-qt5%{_so} = %{version}
 Requires:       marble-frontend = %{version}
 Recommends:     %{name}-doc = %{version}
@@ -121,11 +121,11 @@ Group:          Development/Libraries/KDE
 %description -n libmarblewidget-qt5%{_so}
 The shared library for the MarbleWidget shared library.
 
-%package -n libastro2
+%package -n libastro1
 Summary:        Astronomy: Shared Library
 Group:          Development/Libraries/KDE
 
-%description -n libastro2
+%description -n libastro1
 The Astronomy shared library for the MarbleWidget shared library.
 
 %prep
@@ -172,9 +172,9 @@ cmake -DCMAKE_BUILD_TYPE=%{_kf5_build_type} \
 
 %postun -n libmarblewidget-qt5%{_so} -p /sbin/ldconfig
 
-%post   -n libastro2 -p /sbin/ldconfig
+%post   -n libastro1 -p /sbin/ldconfig
 
-%postun -n libastro2 -p /sbin/ldconfig
+%postun -n libastro1 -p /sbin/ldconfig
 
 %files
 %defattr(-,root,root)
@@ -219,7 +219,7 @@ cmake -DCMAKE_BUILD_TYPE=%{_kf5_build_type} \
 %defattr(-,root,root)
 %{_kf5_libdir}/libmarblewidget-qt5.so.*
 
-%files -n libastro2
+%files -n libastro1
 %defattr(-,root,root)
 %{_kf5_libdir}/libastro.so.*