diff --git a/src/ppd-utils.h b/src/ppd-utils.h
index 6192214..d670b6f 100644
--- a/src/ppd-utils.h
+++ b/src/ppd-utils.h
@@ -11,7 +11,7 @@
 
 #include <gudev/gudev.h>
 
-gboolean write_sysfs (GUdevDevice  *device,
-                      const char   *attribute,
-                      const char   *value,
-                      GError      **error);
+gboolean ppd_utils_write_sysfs (GUdevDevice  *device,
+                                const char   *attribute,
+                                const char   *value,
+                                GError      **error);