diff --git a/compiler/src/dotty/tools/dotc/core/Definitions.scala b/compiler/src/dotty/tools/dotc/core/Definitions.scala
index ce8af0801c3e..97d4a917fe37 100644
--- a/compiler/src/dotty/tools/dotc/core/Definitions.scala
+++ b/compiler/src/dotty/tools/dotc/core/Definitions.scala
@@ -1152,7 +1152,8 @@ class Definitions {
     "lombok.NonNull" ::
     "reactor.util.annotation.NonNull" ::
     "reactor.util.annotation.NonNullApi" ::
-    "io.reactivex.annotations.NonNull" :: Nil)
+    "io.reactivex.annotations.NonNull" ::
+    "org.jspecify.annotations.NonNull" :: Nil)
 
   // convenient one-parameter method types
   def methOfAny(tp: Type): MethodType = MethodType(List(AnyType), tp)