diff --git a/libs/dds_ktx/dds_ktx.nim b/libs/dds_ktx/dds_ktx.nim
index 0fdbe04..c853efd 100644
--- a/libs/dds_ktx/dds_ktx.nim
+++ b/libs/dds_ktx/dds_ktx.nim
@@ -168,7 +168,7 @@ type TexFlags = enum
 proc GetDdsKtxInfo*(p: pointer, len: int, is_sRGB = false): Option[KtxInfo] =
     var tc: ddsktx_texture_info
     var err: ddsktx_error
-    if ddsktx_parse(tc, p, len.cint, err):
+    if len < cint.high and ddsktx_parse(tc, p, len.cint, err):
         let is_cubemap = cast[int8](tc.flags).testBit FlagCubemap.int8
         let is_sRGB = is_sRGB or cast[int8](tc.flags).testBit FlagSrgb.int8
         let has_alpha = cast[int8](tc.flags).testBit FlagAlpha.int8