3 files changed, 5 insertions, 5 deletions
diff --git a/unoidl/source/sourceprovider-parser.y b/unoidl/source/sourceprovider-parser.y
index bb4f5dc2a92a..747437660fdc 100644
--- a/unoidl/source/sourceprovider-parser.y
+++ b/unoidl/source/sourceprovider-parser.y
@@ -63,7 +63,7 @@
 #define YYLLOC_DEFAULT(Current, Rhs, N) \
     do { (Current) = YYRHSLOC((Rhs), (N) ? 1 : 0); } while (0)
 
-void yyerror(YYLTYPE * locp, yyscan_t yyscanner, char const * msg) {
+static void yyerror(YYLTYPE * locp, yyscan_t yyscanner, char const * msg) {
     assert(locp != nullptr);
     unoidl::detail::SourceProviderScannerData * data = yyget_extra(yyscanner);
     data->errorLine = *locp;
diff --git a/unoidl/source/unoidl-check.cxx b/unoidl/source/unoidl-check.cxx
index 41ad76143cd1..94f335cd1266 100644
--- a/unoidl/source/unoidl-check.cxx
+++ b/unoidl/source/unoidl-check.cxx
@@ -27,7 +27,7 @@
 
 namespace unoidl {
 
-bool operator ==(ConstantValue const & lhs, ConstantValue const & rhs) {
+static bool operator ==(ConstantValue const & lhs, ConstantValue const & rhs) {
     if (lhs.type == rhs.type) {
         switch (lhs.type) {
         case ConstantValue::TYPE_BOOLEAN:
@@ -55,11 +55,11 @@ bool operator ==(ConstantValue const & lhs, ConstantValue const & rhs) {
     return false;
 }
 
-bool operator !=(ConstantValue const & lhs, ConstantValue const & rhs) {
+static bool operator !=(ConstantValue const & lhs, ConstantValue const & rhs) {
     return !(lhs == rhs);
 }
 
-bool operator ==(
+static bool operator ==(
     SingleInterfaceBasedServiceEntity::Constructor::Parameter const & lhs,
     SingleInterfaceBasedServiceEntity::Constructor::Parameter const & rhs)
 {
diff --git a/unoidl/source/unoidlprovider.cxx b/unoidl/source/unoidlprovider.cxx
index cb3bd57074ea..bfbed9d02dd6 100644
--- a/unoidl/source/unoidlprovider.cxx
+++ b/unoidl/source/unoidlprovider.cxx
@@ -456,7 +456,7 @@ struct MapEntry {
     Memory32 data;
 };
 
-bool operator <(const Map& map1, const Map& map2) {
+static bool operator <(const Map& map1, const Map& map2) {
     return map1.begin < map2.begin
         || (map1.begin == map2.begin && map1.size < map2.size);
 }