diff --git a/Sources/SwiftDriver/Jobs/GenericUnixToolchain+LinkerSupport.swift b/Sources/SwiftDriver/Jobs/GenericUnixToolchain+LinkerSupport.swift
index a774bd52a..ffdf2a406 100644
--- a/Sources/SwiftDriver/Jobs/GenericUnixToolchain+LinkerSupport.swift
+++ b/Sources/SwiftDriver/Jobs/GenericUnixToolchain+LinkerSupport.swift
@@ -219,10 +219,10 @@ extension GenericUnixToolchain {
 
       if targetTriple.environment == .android {
         if let sysroot = parsedOptions.getLastArgument(.sysroot)?.asSingle {
-          commandLine.appendFlag("-sysroot")
+          commandLine.appendFlag("--sysroot")
           try commandLine.appendPath(VirtualPath(path: sysroot))
         } else if let sysroot = AndroidNDK.getDefaultSysrootPath(in: self.env) {
-          commandLine.appendFlag("-sysroot")
+          commandLine.appendFlag("--sysroot")
           try commandLine.appendPath(VirtualPath(path: sysroot.pathString))
         }
       } else if let path = targetInfo.sdkPath?.path {