diff --git a/smc-tools.spec b/smc-tools.spec
index cca9b71..7c4d301 100644
--- a/smc-tools.spec
+++ b/smc-tools.spec
@@ -28,6 +28,10 @@ sockets in Linux.
 
 
 %build
+%ifarch ppc64le
+# see arch/powerpc/include/uapi/asm/types.h
+%global optflags %optflags -D__SANE_USERSPACE_TYPES__
+%endif
 %set_build_flags
 %make_build