diff --git a/include/arch/aarch64/arch.h b/include/arch/aarch64/arch.h
index e48e201..1fcd0f9 100644
--- a/include/arch/aarch64/arch.h
+++ b/include/arch/aarch64/arch.h
@@ -141,7 +141,7 @@
 #define ID_AA64PFR0_SVE_SHIFT	U(32)
 #define ID_AA64PFR0_SVE_MASK	ULL(0xf)
 #define ID_AA64PFR0_SEL2_SHIFT	U(36)
-#define ID_AA64PFR0_SEL2_MASK	U(0xf)
+#define ID_AA64PFR0_SEL2_MASK	ULL(0xf)
 #define ID_AA64PFR0_MPAM_SHIFT	U(40)
 #define ID_AA64PFR0_MPAM_MASK	ULL(0xf)
 #define ID_AA64PFR0_DIT_SHIFT	U(48)