diff --git a/Sources/Build/BuildOperationBuildSystemDelegateHandler.swift b/Sources/Build/BuildOperationBuildSystemDelegateHandler.swift
index 5ec977c23f7..61d268f8597 100644
--- a/Sources/Build/BuildOperationBuildSystemDelegateHandler.swift
+++ b/Sources/Build/BuildOperationBuildSystemDelegateHandler.swift
@@ -773,7 +773,7 @@ final class BuildOperationBuildSystemDelegateHandler: LLBuildBuildSystemDelegate
                     self.progressAnimation.clear()
                 }
 
-                self.outputStream <<< output
+                self.outputStream <<< output <<< "\n"
                 self.outputStream.flush()
 
                 // next we want to try and scoop out any errors from the output (if reasonable size, otherwise this will be very slow),
diff --git a/Tests/CommandsTests/BuildToolTests.swift b/Tests/CommandsTests/BuildToolTests.swift
index ed7314143d9..5cbbdbcc433 100644
--- a/Tests/CommandsTests/BuildToolTests.swift
+++ b/Tests/CommandsTests/BuildToolTests.swift
@@ -390,4 +390,13 @@ final class BuildToolTests: CommandsTestCase {
             XCTAssertMatch(output, .prefix("digraph Jobs {"))
         }
     }
+    
+    func testSwiftDriverRawOutputGetsNewlines() throws {
+        try fixture(name: "DependencyResolution/Internal/Simple") { fixturePath in
+            // Building with `-wmo` should result in a `remark: Incremental compilation has been disabled: it is not compatible with whole module optimization` message, which should have a trailing newline.
+            let result = try execute(["-c", "release", "-Xswiftc", "-wmo"], packagePath: fixturePath)
+            XCTAssertMatch(result.stdout, .contains("optimization\n["))
+            XCTAssertNoMatch(result.stdout, .contains("optimization["))
+        }
+    }
 }