diff --git a/include/lib/extensions/amu_private.h b/include/lib/extensions/amu_private.h
index 9b4c29c..efa6f6c 100644
--- a/include/lib/extensions/amu_private.h
+++ b/include/lib/extensions/amu_private.h
@@ -16,48 +16,10 @@
 #include <platform_def.h>
 
 #define AMU_GROUP0_MAX_COUNTERS		U(16)
+#define AMU_GROUP1_MAX_COUNTERS		U(16)
 
 #if ENABLE_AMU_AUXILIARY_COUNTERS
 #define AMU_GROUP1_COUNTERS_MASK	U(0)
-
-/* Calculate number of group 1 counters */
-#if (AMU_GROUP1_COUNTERS_MASK	& (1 << 15))
-#define	AMU_GROUP1_NR_COUNTERS		16U
-#elif (AMU_GROUP1_COUNTERS_MASK	& (1 << 14))
-#define	AMU_GROUP1_NR_COUNTERS		15U
-#elif (AMU_GROUP1_COUNTERS_MASK	& (1 << 13))
-#define	AMU_GROUP1_NR_COUNTERS		14U
-#elif (AMU_GROUP1_COUNTERS_MASK	& (1 << 12))
-#define	AMU_GROUP1_NR_COUNTERS		13U
-#elif (AMU_GROUP1_COUNTERS_MASK	& (1 << 11))
-#define	AMU_GROUP1_NR_COUNTERS		12U
-#elif (AMU_GROUP1_COUNTERS_MASK	& (1 << 10))
-#define	AMU_GROUP1_NR_COUNTERS		11U
-#elif (AMU_GROUP1_COUNTERS_MASK	& (1 << 9))
-#define	AMU_GROUP1_NR_COUNTERS		10U
-#elif (AMU_GROUP1_COUNTERS_MASK	& (1 << 8))
-#define	AMU_GROUP1_NR_COUNTERS		9U
-#elif (AMU_GROUP1_COUNTERS_MASK	& (1 << 7))
-#define	AMU_GROUP1_NR_COUNTERS		8U
-#elif (AMU_GROUP1_COUNTERS_MASK	& (1 << 6))
-#define	AMU_GROUP1_NR_COUNTERS		7U
-#elif (AMU_GROUP1_COUNTERS_MASK	& (1 << 5))
-#define	AMU_GROUP1_NR_COUNTERS		6U
-#elif (AMU_GROUP1_COUNTERS_MASK	& (1 << 4))
-#define	AMU_GROUP1_NR_COUNTERS		5U
-#elif (AMU_GROUP1_COUNTERS_MASK	& (1 << 3))
-#define	AMU_GROUP1_NR_COUNTERS		4U
-#elif (AMU_GROUP1_COUNTERS_MASK	& (1 << 2))
-#define	AMU_GROUP1_NR_COUNTERS		3U
-#elif (AMU_GROUP1_COUNTERS_MASK	& (1 << 1))
-#define	AMU_GROUP1_NR_COUNTERS		2U
-#elif (AMU_GROUP1_COUNTERS_MASK	& (1 << 0))
-#define	AMU_GROUP1_NR_COUNTERS		1U
-#else
-#define	AMU_GROUP1_NR_COUNTERS		0U
-#endif
-
-CASSERT(AMU_GROUP1_COUNTERS_MASK <= 0xffff, invalid_amu_group1_counters_mask);
 #endif
 
 struct amu_ctx {
@@ -68,9 +30,9 @@
 #endif
 
 #if ENABLE_AMU_AUXILIARY_COUNTERS
-	uint64_t group1_cnts[AMU_GROUP1_NR_COUNTERS];
+	uint64_t group1_cnts[AMU_GROUP1_MAX_COUNTERS];
 #if __aarch64__
-	uint64_t group1_voffsets[AMU_GROUP1_NR_COUNTERS];
+	uint64_t group1_voffsets[AMU_GROUP1_MAX_COUNTERS];
 #endif
 #endif
 };