diff --git a/include/ircd/simd/shl.h b/include/ircd/simd/shl.h
index db9f73f88..3ebd1c710 100644
--- a/include/ircd/simd/shl.h
+++ b/include/ircd/simd/shl.h
@@ -58,7 +58,7 @@ noexcept
 		b / 8
 	};
 
-	V arg(a), ret;
+	V arg(a), ret(a);
 	for(size_t i(0); i < B; ++i)
 		ret[i] = 0;
 
diff --git a/include/ircd/simd/shr.h b/include/ircd/simd/shr.h
index 5a836e52d..c8e4f3618 100644
--- a/include/ircd/simd/shr.h
+++ b/include/ircd/simd/shr.h
@@ -58,7 +58,7 @@ noexcept
 		b / 8
 	};
 
-	V arg(a), ret;
+	V arg(a), ret(a);
 	for(size_t i(0); i < sizeof(V) - B; ++i)
 		ret[i] = arg[i + B];