diff --git a/builder/builder-options.h b/builder/builder-options.h
index 0e0f6d8ac..a1fb10e58 100644
--- a/builder/builder-options.h
+++ b/builder/builder-options.h
@@ -41,6 +41,8 @@ const char *builder_options_get_cflags (BuilderOptions *self,
                                         BuilderContext *context);
 const char *builder_options_get_cxxflags (BuilderOptions *self,
                                           BuilderContext *context);
+const char *builder_options_get_cppflags (BuilderOptions *self,
+                                          BuilderContext *context);
 const char *builder_options_get_ldflags (BuilderOptions *self,
                                          BuilderContext *context);
 const char *builder_options_get_prefix (BuilderOptions *self,