diff --git a/src/util/supervector/arch/ppc64el/impl.cpp b/src/util/supervector/arch/ppc64el/impl.cpp
index 2eba69b2..295cd128 100644
--- a/src/util/supervector/arch/ppc64el/impl.cpp
+++ b/src/util/supervector/arch/ppc64el/impl.cpp
@@ -49,7 +49,7 @@ really_inline SuperVector<16>::SuperVector(SuperVector const &other)
 
 template<>
 template<>
-really_inline SuperVector<16>::SuperVector(char __bool __vector v)
+really_inline SuperVector<16>::SuperVector(__vector __bool char v)
 {
     u.u8x16[0] = (uint8x16_t) v;
 };