diff --git a/src/soc/intel/common/block/fast_spi/fast_spi.c b/src/soc/intel/common/block/fast_spi/fast_spi.c
index e40b844..5c29add 100644
--- a/src/soc/intel/common/block/fast_spi/fast_spi.c
+++ b/src/soc/intel/common/block/fast_spi/fast_spi.c
@@ -241,7 +241,7 @@
 	 * protection, so limit the cached bios region to be no more than 16MB.
 	 * */
 	bios_size = MIN(bios_size, 16 * MiB);
-	if (!bios_size)
+	if (bios_size <= 0)
 		return;
 
 	/* Round to power of two */