diff --git a/subsys/bluetooth/controller/util/mem.c b/subsys/bluetooth/controller/util/mem.c
index 3b5183733a4..6f2166246e7 100644
--- a/subsys/bluetooth/controller/util/mem.c
+++ b/subsys/bluetooth/controller/util/mem.c
@@ -115,7 +115,7 @@ void mem_rcopy(u8_t *dst, u8_t const *src, u16_t len)
 	}
 }
 
-u8_t mem_is_zero(u8_t *src, u16_t len)
+u8_t mem_nz(u8_t *src, u16_t len)
 {
 	while (len--) {
 		if (*src++) {
diff --git a/subsys/bluetooth/controller/util/mem.h b/subsys/bluetooth/controller/util/mem.h
index f86672a64f7..3869817d5df 100644
--- a/subsys/bluetooth/controller/util/mem.h
+++ b/subsys/bluetooth/controller/util/mem.h
@@ -25,7 +25,7 @@ void *mem_get(void *mem_pool, u16_t mem_size, u16_t index);
 u16_t mem_index_get(void *mem, void *mem_pool, u16_t mem_size);
 
 void mem_rcopy(u8_t *dst, u8_t const *src, u16_t len);
-u8_t mem_is_zero(u8_t *src, u16_t len);
+u8_t mem_nz(u8_t *src, u16_t len);
 
 u32_t mem_ut(void);