diff --git a/src/engine/api/json_factory.cpp b/src/engine/api/json_factory.cpp
index 6bd49ac7d..23f4807d1 100644
--- a/src/engine/api/json_factory.cpp
+++ b/src/engine/api/json_factory.cpp
@@ -100,7 +100,7 @@ util::json::Object makeStepManeuver(const guidance::StepManeuver &maneuver)
 {
     util::json::Object step_maneuver;
     step_maneuver.values["type"] = detail::instructionTypeToString(maneuver.instruction.type);
-    if( isValidModifier( maneuver.instruction.type, maneuver.instruction.direction_modifier ) )
+    if( guidance::isValidModifier( maneuver.instruction.type, maneuver.instruction.direction_modifier ) )
       step_maneuver.values["modifier"] =
           detail::instructionModifierToString(maneuver.instruction.direction_modifier);
     step_maneuver.values["location"] = detail::coordinateToLonLat(maneuver.location);
diff --git a/src/extractor/turn_analysis.cpp b/src/extractor/turn_analysis.cpp
index b4d5c29e3..c45ea014c 100644
--- a/src/extractor/turn_analysis.cpp
+++ b/src/extractor/turn_analysis.cpp
@@ -47,6 +47,7 @@ using engine::guidance::isConflict;
 using engine::guidance::isSlightTurn;
 using engine::guidance::isSlightModifier;
 using engine::guidance::mirrorDirectionModifier;
+using engine::guidance::canBeSuppressed;
 
 #define PRINT_DEBUG_CANDIDATES 0
 std::vector<TurnCandidate>