diff --git a/Passepartout/Sources/VPN/TunnelKitProvider+FileConfiguration.swift b/Passepartout/Sources/VPN/TunnelKitProvider+FileConfiguration.swift
index 14f8aa86..f991bca9 100644
--- a/Passepartout/Sources/VPN/TunnelKitProvider+FileConfiguration.swift
+++ b/Passepartout/Sources/VPN/TunnelKitProvider+FileConfiguration.swift
@@ -236,8 +236,12 @@ extension TunnelKitProvider.Configuration {
                 isHandled = true
                 compressionFraming = .compLZO
                 
-                guard let arg = $0.first, arg == "no" else {
-                    warning = warning ?? .unsupportedConfiguration(option: "compression")
+                guard let arg = $0.first else {
+                    warning = warning ?? .unsupportedConfiguration(option: line)
+                    return
+                }
+                guard arg == "no" else {
+                    unsupportedError = .unsupportedConfiguration(option: line)
                     return
                 }
             }
@@ -246,7 +250,7 @@ extension TunnelKitProvider.Configuration {
                 compressionFraming = .compress
 
                 guard $0.isEmpty else {
-                    warning = warning ?? .unsupportedConfiguration(option: "compression")
+                    unsupportedError = .unsupportedConfiguration(option: line)
                     return
                 }
             }
diff --git a/PassepartoutTests-iOS/FileConfigurationTests.swift b/PassepartoutTests-iOS/FileConfigurationTests.swift
index 9c6aa37d..ed66541c 100644
--- a/PassepartoutTests-iOS/FileConfigurationTests.swift
+++ b/PassepartoutTests-iOS/FileConfigurationTests.swift
@@ -55,6 +55,17 @@ class FileConfigurationTests: XCTestCase {
         print(stripped)
     }
     
+    func testCompression() throws {
+        let base: [String] = ["<ca>", "</ca>", "remote 1.2.3.4"]
+        
+        XCTAssertNotNil(try TunnelKitProvider.Configuration.parsed(fromLines: base + ["comp-lzo"]).warning)
+        XCTAssertNoThrow(try TunnelKitProvider.Configuration.parsed(fromLines: base + ["comp-lzo no"]))
+        XCTAssertThrowsError(try TunnelKitProvider.Configuration.parsed(fromLines: base + ["comp-lzo yes"]))
+
+        XCTAssertNoThrow(try TunnelKitProvider.Configuration.parsed(fromLines: base + ["compress"]))
+        XCTAssertThrowsError(try TunnelKitProvider.Configuration.parsed(fromLines: base + ["compress lzo"]))
+    }
+    
     private func url(withName name: String) -> URL {
         return Bundle(for: FileConfigurationTests.self).url(forResource: name, withExtension: "ovpn")!
     }