diff --git a/schema/extended_header.cpp b/schema/extended_header.cpp
index 3236b040c49..3ccf122524a 100644
--- a/schema/extended_header.cpp
+++ b/schema/extended_header.cpp
@@ -91,8 +91,5 @@ uint64_t GetUInt64LE(const uint8_t* data) {
   };
 }
 
-// Define storage for the static.
-constexpr char ExtendedHeader::kMagic[kMagicSize];
-
 } // namespace runtime
 } // namespace executorch