diff --git a/src/Color.cpp b/src/Color.cpp
index 3aa3921561..95074309c8 100644
--- a/src/Color.cpp
+++ b/src/Color.cpp
@@ -45,7 +45,6 @@ using std::endl;
 
 namespace lyx {
 
-using support::compare_ascii_no_case;
 using support::ascii_lowercase;
 
 struct ColorSet::ColorEntry {
diff --git a/src/factory.cpp b/src/factory.cpp
index 53d5f83086..0f3ebb6152 100644
--- a/src/factory.cpp
+++ b/src/factory.cpp
@@ -76,8 +76,6 @@ namespace lyx {
 
 namespace Alert = frontend::Alert;
 
-using support::compare_ascii_no_case;
-
 
 Inset * createInset(Buffer & buf, FuncRequest const & cmd)
 {