diff --git a/src/crc32.c b/src/crc32.c
index 61cff0a..35dff81 100644
--- a/src/crc32.c
+++ b/src/crc32.c
@@ -30,7 +30,7 @@ static uint32_t crc32_table(const uint8_t *p, size_t size, uint32_t *table) {
 
 JUICE_EXPORT uint32_t juice_crc32(const void *data, size_t size) {
 	static uint32_t table[256] = {0};
-	if (table[0] == 0)
+	if (table[255] == 0)
 		for (uint32_t i = 0; i < 256; ++i)
 			table[i] = crc32_byte(i);