diff --git a/developer-doc/Doxyfile b/developer-doc/Doxyfile
index 91380e38f4aae3d7d3845a97bd9e532f94850acb..8b246b3514ca74a1e28d74f39a1ea626e6afed63 100644
--- a/developer-doc/Doxyfile
+++ b/developer-doc/Doxyfile
@@ -2061,7 +2061,8 @@ PREDEFINED             = __cplusplus=201103L \
   __PLUMED_WRAPPER_C_END= \
   __PLUMED_WRAPPER_EXTERN_C_BEGIN \
   __PLUMED_WRAPPER_EXTERN_C_END \
-  __PLUMED_WRAPPER_CXX_NOEXCEPT=noexcept
+  __PLUMED_WRAPPER_CXX_NOEXCEPT=noexcept \
+  __PLUMED_WRAPPER_CXX_EXPLICIT=explicit
 
 
 # If the MACRO_EXPANSION and EXPAND_ONLY_PREDEF tags are set to YES then this