diff --git a/Framework/Core/include/Framework/InputSpec.h b/Framework/Core/include/Framework/InputSpec.h
index d9e3f3201d66d..2a21f9d161b52 100644
--- a/Framework/Core/include/Framework/InputSpec.h
+++ b/Framework/Core/include/Framework/InputSpec.h
@@ -17,7 +17,9 @@
 
 #include <string>
 #include <ostream>
+#if !defined(__CLING__) && !defined(__ROOTCLING__)
 #include <variant>
+#endif
 
 namespace o2::framework
 {
@@ -57,7 +59,9 @@ struct InputSpec {
   std::string binding;
 
   /// The actual matcher for the input spec.
+#if !defined(__CLING__) && !defined(__ROOTCLING__)
   std::variant<ConcreteDataMatcher, data_matcher::DataDescriptorMatcher> matcher;
+#endif
 
   enum Lifetime lifetime;
 
diff --git a/Framework/Core/include/Framework/OutputSpec.h b/Framework/Core/include/Framework/OutputSpec.h
index 8bb008774661e..6f8357c127e37 100644
--- a/Framework/Core/include/Framework/OutputSpec.h
+++ b/Framework/Core/include/Framework/OutputSpec.h
@@ -14,7 +14,9 @@
 #include "Framework/Lifetime.h"
 #include "Framework/ConcreteDataMatcher.h"
 
+#if !defined(__CLING__) && !defined(__ROOTCLING__)
 #include <variant>
+#endif
 
 namespace o2::framework
 {
@@ -28,7 +30,9 @@ struct OutputLabel {
 /// topology.
 struct OutputSpec {
   OutputLabel binding;
+#if !defined(__CLING__) && !defined(__ROOTCLING__)
   std::variant<ConcreteDataMatcher, ConcreteDataTypeMatcher> matcher;
+#endif
   enum Lifetime lifetime = Lifetime::Timeframe;
 
   /// Build a fully qualified tuple for the OutputSpec