diff --git a/tools/ade b/tools/ade
index d8668c793c92ae140e3a4cad0219f8454f9dcf71..53c620494580921610e5789fcbdc6e36818dc7bf 100755
--- a/tools/ade
+++ b/tools/ade
@@ -645,7 +645,7 @@ class Project:
 
         if sysroot:
             cflags += ["--sysroot=" + sysroot.path]
-            cflags += ["-I" + os.path.join(sysroot.path, '/usr/include')]
+            cflags += ["-I" + os.path.join(sysroot.path, 'usr', 'include')]
             ldflags += ["--sysroot=" + sysroot.path]
             args += ["--host=" + TargetTriplet(sysroot.version.arch).triplet]
             args += ["--with-sysroot=" + sysroot.path]