diff --git a/openmp/libomptarget/src/rtl.h b/openmp/libomptarget/src/rtl.h
--- a/openmp/libomptarget/src/rtl.h
+++ b/openmp/libomptarget/src/rtl.h
@@ -13,6 +13,7 @@
 #ifndef _OMPTARGET_RTL_H
 #define _OMPTARGET_RTL_H
 
+#include "omptarget.h"
 #include <list>
 #include <map>
 #include <mutex>
@@ -121,9 +122,9 @@
   // binaries.
   std::vector<RTLInfoTy *> UsedRTLs;
 
-  int64_t RequiresFlags;
+  int64_t RequiresFlags = OMP_REQ_UNDEFINED;
 
-  explicit RTLsTy() {}
+  explicit RTLsTy() = default;
 
   // Register the clauses of the requires directive.
   void RegisterRequires(int64_t flags);