diff --git a/ghostscript.changes b/ghostscript.changes
index fbffe44..062ee30 100644
--- a/ghostscript.changes
+++ b/ghostscript.changes
@@ -1,3 +1,17 @@
+-------------------------------------------------------------------
+Fri Mar 16 10:27:01 CET 2012 - jsmeix@suse.de
+
+- Unfortunately ghostscript-library.spec and ghostscript-mini.spec
+  have unversioned "Provides: ghostscript" and for RPM this means
+  that both ghostscript-library and ghostscript-mini
+  provide any version of ghostscript. Therefore any non-matching
+  version of ghostscript-library and ghostscript-mini fulfill
+  any RPM requirement for ghostscript in the ghostscript-x11
+  and ghostscript-devel sub-packages which is wrong.
+  Therefore explicit conflicts with ghostscript-library and
+  ghostscript-mini are specified in the ghostscript-x11
+  and ghostscript-devel sub-packages to avoid the mess.
+
 -------------------------------------------------------------------
 Thu Mar 15 16:43:26 CET 2012 - jsmeix@suse.de
 
diff --git a/ghostscript.spec b/ghostscript.spec
index 2fabab7..559cfbe 100644
--- a/ghostscript.spec
+++ b/ghostscript.spec
@@ -207,6 +207,20 @@ under the X Window System.
 License:        GPL-3.0
 Summary:        Development files for Ghostscript
 Requires:       ghostscript = %{version}
+# Unfortunately ghostscript-library.spec and ghostscript-mini.spec have
+# an unversioned "Provides: ghostscript" and for RPM this means that both
+# ghostscript-library and ghostscript-mini provide any version of "ghostscript"
+# so that any version of ghostscript-library and ghostscript-mini fulfills
+# the above versioned requirement which is wrong and therefore an explicit conflicts
+# is used here to avoid the mess.
+# Above the ghostscript main package "Provides: ghostscript-library = version" so that
+# versioned conflicts are needed to avoid a conflict with the ghostscript main package.
+# The RPM documentation http://www.rpm.org/max-rpm/s1-rpm-depend-manual-dependencies.html
+# and /usr/share/doc/packages/rpm/manual/dependencies (in rpm-4.8.0 in openSUSE 11.4)
+# does not show a comparison operator for "not equal" so that two conflicts are used:
+Conflicts:      ghostscript-library < %{version}
+Conflicts:      ghostscript-library > %{version}
+Conflicts:      ghostscript-mini
 Group:          Development/Libraries/C and C++
 
 %description devel