diff --git a/components/esm/defs.hpp b/components/esm/defs.hpp
index 265e355871..abe433ca55 100644
--- a/components/esm/defs.hpp
+++ b/components/esm/defs.hpp
@@ -42,10 +42,10 @@ namespace ESM
     // Position and rotation
     struct Position
     {
-        float pos[3];
+        float pos[3]{};
 
         // In radians
-        float rot[3];
+        float rot[3]{};
 
         osg::Vec3f asVec3() const { return osg::Vec3f(pos[0], pos[1], pos[2]); }