diff --git a/src/admissibility.hpp b/src/admissibility.hpp
index e78a58ff..8bb43c72 100644
--- a/src/admissibility.hpp
+++ b/src/admissibility.hpp
@@ -39,7 +39,7 @@ class AxisAlignedBoundingBox;
 class AdmissibilityCondition
 {
 public:
-  AdmissibilityCondition() : maxWidth_((size_t)-1L) {}
+  AdmissibilityCondition() : ratio_(0.0), maxWidth_((size_t)-1L) {}
   /*! \brief Virtual copy constructor */
   virtual AdmissibilityCondition * clone() const = 0;