diff --git a/cmake/modules/FindQalculate.cmake b/cmake/modules/FindQalculate.cmake
--- a/cmake/modules/FindQalculate.cmake
+++ b/cmake/modules/FindQalculate.cmake
@@ -30,9 +30,10 @@
       pkg_check_modules(_pc_QALCULATE libqalculate)
     endif(QALCULATE_MIN_VERSION)
 
-    pkg_check_modules(_pc_CLN cln)
-
     if(_pc_QALCULATE_FOUND)
+      if(${_pc_QALCULATE_VERSION} VERSION_LESS 2.0.0)
+        pkg_check_modules(_pc_CLN cln)
+      endif()
       set(QALCULATE_CFLAGS ${_pc_QALCULATE_CFLAGS})
     endif(_pc_QALCULATE_FOUND)
 
@@ -52,13 +53,17 @@
       ${INCLUDE_INSTALL_DIR}
     )
 
-    find_library(CLN_LIBRARIES
-      NAMES
-      cln
-      PATHS
-      ${_pc_CLN_LIBRARY_DIRS}
-      ${LIB_INSTALL_DIR}
-    )
+    if(_pc_QALCULATE_FOUND)
+      if(${_pc_QALCULATE_VERSION} VERSION_LESS 2.0.0)
+        find_library(CLN_LIBRARIES
+          NAMES
+          cln
+          PATHS
+          ${_pc_CLN_LIBRARY_DIRS}
+          ${LIB_INSTALL_DIR}
+        )
+      endif()
+    endif()
 
   else(NOT WIN32)
     # XXX: currently no libqalculate on windows