--- src/tools/cryptoflex-tool.c
+++ src/tools/cryptoflex-tool.c
@@ -501,7 +501,7 @@
 		if (keysize == 0)
 			break;
 		idx += keysize;
-		for (i = 0; i < sizeof(sizes)/sizeof(int); i++)
+		for (i = 0; i < sizeof(sizes)/sizeof(*sizes); i++)
 			if (sizes[i] == keysize)
 				mod_len = mod_lens[i];
 		if (mod_len < 0)