diff --git a/openmp/libomptarget/deviceRTLs/amdgcn/src/target_impl.h b/openmp/libomptarget/deviceRTLs/amdgcn/src/target_impl.h
index b10f34a16642..192e355c62fa 100644
--- a/openmp/libomptarget/deviceRTLs/amdgcn/src/target_impl.h
+++ b/openmp/libomptarget/deviceRTLs/amdgcn/src/target_impl.h
@@ -16,9 +16,11 @@
 #error "amdgcn target_impl.h expects to be compiled under __AMDGCN__"
 #endif
 
-#include <stdint.h>
 #include "amdgcn_interface.h"
 
+#include <stddef.h>
+#include <stdint.h>
+
 #define DEVICE __attribute__((device))
 #define INLINE inline DEVICE
 #define NOINLINE __attribute__((noinline)) DEVICE