diff --git a/cmake/modules/BasicConfig.cmake b/cmake/modules/BasicConfig.cmake
index d7e0c75..1413385 100644
--- a/cmake/modules/BasicConfig.cmake
+++ b/cmake/modules/BasicConfig.cmake
@@ -538,6 +538,13 @@ if (LIB_SUFFIX_64 AND CMAKE_SIZEOF_VOID_P MATCHES "8")
 elseif (LIB_SUFFIX_32 AND CMAKE_SIZEOF_VOID_P MATCHES "4")
     set(SELECTED_LIB_SUFFIX "${LIB_SUFFIX_32}")
 endif ()
+
+# ignore LIB_SUFFIX variables if CMAKE_INSTALL_LIBDIR ends with that suffix anyways (%cmake RPM macro apparently passes
+# LIB_SUFFIX and CMAKE_INSTALL_LIBDIR/LIB_INSTALL_DIR at the same time)
+if (CMAKE_INSTALL_LIBDIR MATCHES ".*${SELECTED_LIB_SUFFIX}$")
+    set(SELECTED_LIB_SUFFIX "")
+endif ()
+
 set(BIN_INSTALL_DESTINATION "${CMAKE_INSTALL_PREFIX}/${CMAKE_INSTALL_BINDIR}")
 set(LIB_INSTALL_DESTINATION "${CMAKE_INSTALL_PREFIX}/${CMAKE_INSTALL_LIBDIR}${SELECTED_LIB_SUFFIX}")