diff --git a/src/security/certificate-extension.hpp b/src/security/certificate-extension.hpp
index 4267560..cad811f 100644
--- a/src/security/certificate-extension.hpp
+++ b/src/security/certificate-extension.hpp
@@ -94,7 +94,7 @@
     return m_extensionId;
   }
 
-  inline const bool
+  inline bool
   getIsCritical() const
   {
     return m_isCritical;