diff --git a/include/cling/Interpreter/DynamicLookupRuntimeUniverse.h b/include/cling/Interpreter/DynamicLookupRuntimeUniverse.h
index d56221d5..7e17db3a 100644
--- a/include/cling/Interpreter/DynamicLookupRuntimeUniverse.h
+++ b/include/cling/Interpreter/DynamicLookupRuntimeUniverse.h
@@ -13,7 +13,7 @@
 #error "This file must not be included by compiled programs."
 #endif
 
-class DynamicExprInfo;
+#include "cling/Interpreter/DynamicExprInfo.h"
 #include "cling/Interpreter/DynamicLookupLifetimeHandler.h"
 #include "cling/Interpreter/Value.h"