diff --git a/prisma/migrations/20210129080945_add_detailed_map_fk/migration.sql b/prisma/migrations/20210129080945_add_detailed_map_fk/migration.sql
new file mode 100644
index 000000000..b62c4e01b
--- /dev/null
+++ b/prisma/migrations/20210129080945_add_detailed_map_fk/migration.sql
@@ -0,0 +1,2 @@
+-- AddForeignKey
+ALTER TABLE "DetailedMap" ADD FOREIGN KEY ("ladderMatchId") REFERENCES "LadderMatch"("id") ON DELETE SET NULL ON UPDATE CASCADE;
diff --git a/prisma/schema.prisma b/prisma/schema.prisma
index 14b9109ec..d45cec6b7 100644
--- a/prisma/schema.prisma
+++ b/prisma/schema.prisma
@@ -292,6 +292,7 @@ model LadderMatch {
   dayId      Int
   players    LadderMatchPlayer[]
   day        LadderDay           @relation(fields: [dayId], references: [id])
+  details    DetailedMap[]
 }
 
 model LadderDay {
@@ -311,6 +312,7 @@ model DetailedMap {
   date          DateTime?
   ladderMatchId Int?
   players       DetailedMapPlayer[]
+  ladderMatch   LadderMatch?        @relation(fields: [ladderMatchId], references: [id])
 }
 
 enum WinnerLoser {