diff --git a/lib/extensions/amu/aarch32/amu_helpers.S b/lib/extensions/amu/aarch32/amu_helpers.S
index d387341..8ac7678 100644
--- a/lib/extensions/amu/aarch32/amu_helpers.S
+++ b/lib/extensions/amu/aarch32/amu_helpers.S
@@ -84,6 +84,7 @@
 	bx		lr
 endfunc amu_group0_cnt_write_internal
 
+#if ENABLE_AMU_AUXILIARY_COUNTERS
 /*
  * uint64_t amu_group1_cnt_read_internal(int idx);
  *
@@ -267,3 +268,4 @@
 	stcopr	r1, AMEVTYPER1F /* index 15 */
 	bx	lr
 endfunc amu_group1_set_evtype_internal
+#endif