diff --git a/modules/consumerir/consumerir.c b/modules/consumerir/consumerir.c
index f3eac0b..b0ff940 100644
--- a/modules/consumerir/consumerir.c
+++ b/modules/consumerir/consumerir.c
@@ -22,7 +22,7 @@
 #include <hardware/hardware.h>
 #include <hardware/consumerir.h>
 
-#define ARRAY_SIZE(a) (sizeof(a) / sizeof(a[0]))
+#define ARRAY_SIZE(a) (sizeof(a) / sizeof((a)[0]))
 
 static const consumerir_freq_range_t consumerir_freqs[] = {
     {.min = 30000, .max = 30000},