diff --git a/include/blosc2.h b/include/blosc2.h
index 8a1f2f11..8b5b2239 100644
--- a/include/blosc2.h
+++ b/include/blosc2.h
@@ -294,7 +294,7 @@ enum {
   BLOSC2_GLOBAL_REGISTERED_CODECS_START = 32,
   BLOSC2_GLOBAL_REGISTERED_CODECS_STOP = 159,
   //!< Blosc-registered codecs must be between 31 - 159.
-  BLOSC2_GLOBAL_REGISTERED_CODECS = 1,
+  BLOSC2_GLOBAL_REGISTERED_CODECS = 5,
     //!< Number of Blosc-registered codecs at the moment.
   BLOSC2_USER_REGISTERED_CODECS_START = 160,
   BLOSC2_USER_REGISTERED_CODECS_STOP = 255,
diff --git a/include/blosc2/codecs-registry.h b/include/blosc2/codecs-registry.h
index f772a0a1..058fe744 100644
--- a/include/blosc2/codecs-registry.h
+++ b/include/blosc2/codecs-registry.h
@@ -22,6 +22,7 @@ enum {
     BLOSC_CODEC_ZFP_FIXED_ACCURACY = 33,
     BLOSC_CODEC_ZFP_FIXED_PRECISION = 34,
     BLOSC_CODEC_ZFP_FIXED_RATE = 35,
+    BLOSC_CODEC_OPENHTJ2K = 36,
 };
 
 void register_codecs(void);
diff --git a/plugins/codecs/codecs-registry.c b/plugins/codecs/codecs-registry.c
index def6452d..7fdccba3 100644
--- a/plugins/codecs/codecs-registry.c
+++ b/plugins/codecs/codecs-registry.c
@@ -47,4 +47,13 @@ void register_codecs(void) {
   zfp_rate.decoder = &zfp_rate_decompress;
   zfp_rate.compname = "zfp_rate";
   register_codec_private(&zfp_rate);
+
+  blosc2_codec openhtj2k;
+  openhtj2k.compcode = BLOSC_CODEC_OPENHTJ2K;
+  openhtj2k.version = 1;
+  openhtj2k.complib = BLOSC_CODEC_OPENHTJ2K;
+  openhtj2k.encoder = NULL;
+  openhtj2k.decoder = NULL;
+  openhtj2k.compname = "openhtj2k";
+  register_codec_private(&openhtj2k);
 }