diff --git a/code/espurna/light.cpp b/code/espurna/light.cpp
index e3c879121c..aa87698905 100644
--- a/code/espurna/light.cpp
+++ b/code/espurna/light.cpp
@@ -55,7 +55,7 @@ static_assert(std::is_trivially_copyable<Light::MiredsRange>::value, "");
 namespace Light {
 
 // TODO: unless we are building with latest Core versions and -std=c++17, these need to be explicitly bound to at least one object file
-#if __cplusplus <= 201703L
+#if __cplusplus < 201703L
 constexpr long Rgb::Min;
 constexpr long Rgb::Max;