diff --git a/core/math/big/radix.odin b/core/math/big/radix.odin
index a5100e478..a1c25b55e 100644
--- a/core/math/big/radix.odin
+++ b/core/math/big/radix.odin
@@ -280,7 +280,7 @@ int_atoi :: proc(res: ^Int, input: string, radix := i8(10), allocator := context
 		}
 
 		pos := ch - '+'
-		if RADIX_TABLE_REVERSE_SIZE <= pos {
+		if RADIX_TABLE_REVERSE_SIZE <= u32(pos) {
 			break
 		}
 		y := RADIX_TABLE_REVERSE[pos]