diff --git a/plugins/LadspaEffect/calf/CMakeLists.txt b/plugins/LadspaEffect/calf/CMakeLists.txt
index 776752bc5..4924169e4 100644
--- a/plugins/LadspaEffect/calf/CMakeLists.txt
+++ b/plugins/LadspaEffect/calf/CMakeLists.txt
@@ -16,8 +16,9 @@ LIST(SORT SOURCES)
 # Skip files matching pattern
 SET(FILE_PATTERNS "ctl;gui;gtk;session;connector;jack;rdf;draw;fluid;preset;lv2;benchmark;win;plugin.cpp")
 FOREACH(_item ${SOURCES})
+	GET_FILENAME_COMPONENT(m_basename ${_item} NAME)
 	FOREACH(_pattern ${FILE_PATTERNS})
-		IF(${_item} MATCHES ${_pattern})
+		IF(${m_basename} MATCHES ${_pattern})
 			LIST(REMOVE_ITEM SOURCES ${_item})
 		ENDIF()
 	ENDFOREACH()