diff --git a/src/g_shared/a_dynlightdata.cpp b/src/g_shared/a_dynlightdata.cpp
index afe5157e1..3c1f7c134 100644
--- a/src/g_shared/a_dynlightdata.cpp
+++ b/src/g_shared/a_dynlightdata.cpp
@@ -140,12 +140,16 @@ public:
 
 protected:
    FName m_Name;
-   int m_Args[5];
-   double m_Param;
-   DVector3 m_Pos;
+   int m_Args[5] = { 0,0,0,0,0 };
+   double m_Param = 0;
+   DVector3 m_Pos = { 0,0,0 };
    ELightType m_type;
-   int8_t m_attenuate;
-   bool m_subtractive, m_additive, m_halo, m_dontlightself, m_dontlightactors;
+   int8_t m_attenuate = -1;
+   bool m_subtractive = false;
+   bool m_additive = false;
+   bool m_halo = false;
+   bool m_dontlightself = false;
+   bool m_dontlightactors = false;
    bool m_swapped = false;
 };
 
@@ -161,17 +165,6 @@ FLightDefaults::FLightDefaults(FName name, ELightType type)
 {
 	m_Name = name;
 	m_type = type;
-
-	m_Pos.Zero();
-	memset(m_Args, 0, sizeof(m_Args));
-	m_Param = 0;
-
-	m_subtractive = false;
-	m_additive = false;
-	m_halo = false;
-	m_dontlightself = false;
-	m_dontlightactors = false;
-	m_attenuate = -1;
 }
 
 void FLightDefaults::ApplyProperties(ADynamicLight * light) const