diff --git a/src/api/scoped_refptr.h b/src/api/scoped_refptr.h
index 6ff8a3cf..5d58968e 100644
--- a/src/api/scoped_refptr.h
+++ b/src/api/scoped_refptr.h
@@ -68,6 +68,9 @@
 
 #include "absl/base/nullability.h"
 
+// Compatibility shim for abseil versions that remove absl::Nonnull and
+// absl::Nullable.
+#if ABSL_LTS_RELEASE_VERSION > 20250512
 namespace absl {
 #ifdef absl_nonnull
 template<typename T>
@@ -79,6 +82,7 @@ template<typename T>
 using Nullable = T absl_nullable;
 #endif // absl_nullable
 }
+#endif // ABSL_LTS_RELEASE_VERSION > 20250512
 
 namespace webrtc {