diff --git a/src/FindBISON.cmake b/src/FindBISON.cmake
index 552ce0d..e07dd04 100644
--- a/src/FindBISON.cmake
+++ b/src/FindBISON.cmake
@@ -8,6 +8,7 @@
 
 
 FIND_PROGRAM(BISON_EXECUTABLE NAMES bison)
+mark_as_advanced(BISON_DIR Bison_DIR)
 
 #INCLUDE(MacroEnsureVersion)
 
diff --git a/src/FindFLEX.cmake b/src/FindFLEX.cmake
index 30285f1..34312e6 100644
--- a/src/FindFLEX.cmake
+++ b/src/FindFLEX.cmake
@@ -8,6 +8,7 @@
 
 
 FIND_PROGRAM(FLEX_EXECUTABLE NAMES flex)
+mark_as_advanced(FLEX_DIR Flex_DIR)
 
 #INCLUDE(MacroEnsureVersion)
 
diff --git a/src/SVNVersion.cmake b/src/SVNVersion.cmake
index 1ddd45f..1e476b0 100644
--- a/src/SVNVersion.cmake
+++ b/src/SVNVersion.cmake
@@ -13,8 +13,10 @@ set_source_files_properties(version.h
 	PROPERTIES
 	GENERATED true)
 find_program (SVNVERSION_EXECUTABLE NAMES svnversion)
+mark_as_advanced (SVNVERSION_EXECUTABLE)
 if (SVNVERSION_EXECUTABLE)
 	# svnversion found; we should always build this
+	mark_as_advanced (SVN_Version)
 	message (STATUS "Generating version.h using svnversion command")
 	exec_program (${SVNVERSION_EXECUTABLE}
 		OUTPUT_VARIABLE SVN_Version