diff --git a/package/fake/minisip/minisip.conf b/package/fake/minisip/minisip.conf
index d21d3ee9b..7289ad217 100644
--- a/package/fake/minisip/minisip.conf
+++ b/package/fake/minisip/minisip.conf
@@ -6,3 +6,8 @@ minisip_pc() {
 }
 
 hook_add preconf 3 minisip_pc
+
+# without this the package fails to
+# build when compiling with -O1 ...
+var_append GCC_WRAPPER_APPEND " " "-funit-at-a-time"
+