diff --git a/cc/ndk_prebuilt.go b/cc/ndk_prebuilt.go
index fb16887..4356732 100644
--- a/cc/ndk_prebuilt.go
+++ b/cc/ndk_prebuilt.go
@@ -151,7 +151,7 @@
 		ctx.ModuleErrorf("NDK prebuilt libraries must have an ndk_lib prefixed name")
 	}
 
-	ndk.exportIncludes(ctx, "-isystem ")
+	ndk.exportIncludesAsSystem(ctx)
 
 	libName := strings.TrimPrefix(ctx.ModuleName(), "ndk_")
 	libExt := flags.Toolchain.ShlibSuffix()