diff --git a/readme.txt b/readme.txt
index 4cb696dd..b9ae9006 100644
--- a/readme.txt
+++ b/readme.txt
@@ -106,6 +106,7 @@ GC/Wii DSP ADPCM:
 - .amts
 - .asr
 - .bns
+- .capdsp
 - .cfn
 - .dsp
   - standard, with dual file stereo
diff --git a/unix/data.c b/unix/data.c
index 340c2b46..a23a4424 100644
--- a/unix/data.c
+++ b/unix/data.c
@@ -48,6 +48,7 @@ gchar *vgmstream_exts [] = {
   "brstmspm",
 
   "caf",
+  "capdsp",
   "ccc",
   "cfn",
   "cnk",