2 files changed, 2 insertions, 4 deletions
diff --git a/include/mbgl/style/function/exponential_stops.hpp b/include/mbgl/style/function/exponential_stops.hpp
index 1c57ec6f5d..b3866c4059 100644
--- a/include/mbgl/style/function/exponential_stops.hpp
+++ b/include/mbgl/style/function/exponential_stops.hpp
@@ -24,8 +24,7 @@ public:
 
     optional<T> evaluate(float z) const {
         if (stops.empty()) {
-            assert(false);
-            return T();
+            return {};
         }
 
         auto it = stops.upper_bound(z);
@@ -42,7 +41,7 @@ public:
     optional<T> evaluate(const Value& value) const {
         optional<float> z = numericValue<float>(value);
         if (!z) {
-            return T();
+            return {};
         }
         return evaluate(*z);
     }
diff --git a/include/mbgl/style/function/interval_stops.hpp b/include/mbgl/style/function/interval_stops.hpp
index a482a6081c..45e2dc6f2e 100644
--- a/include/mbgl/style/function/interval_stops.hpp
+++ b/include/mbgl/style/function/interval_stops.hpp
@@ -20,7 +20,6 @@ public:
 
     optional<T> evaluate(float z) const {
         if (stops.empty()) {
-            assert(false);
             return {};
         }