diff --git a/readme.txt b/readme.txt
index f994ac7b..c4d9f07f 100644
--- a/readme.txt
+++ b/readme.txt
@@ -126,6 +126,7 @@ File types supported by this version of vgmstream:
 - .bg00 (PS2 ADPCM)
 - .dvi (DVI IMA ADPCM)
 - .kcey (EACS IMA ADPCM)
+- .rstm (PS2 ADPCM)
 
 Enjoy!
 -hcs
diff --git a/src/Makefile b/src/Makefile
index 9afb0f1c..e4f8a9bf 100644
--- a/src/Makefile
+++ b/src/Makefile
@@ -92,7 +92,7 @@ META_OBJS=meta/adx_header.o \
     meta/sat_dvi.o \
     meta/ps2_bg00.o \
     meta/dc_kcey.o \
-		meta/ps2_rstm.o
+    meta/ps2_rstm.o
 
 OBJECTS=vgmstream.o streamfile.o util.o $(CODING_OBJS) $(LAYOUT_OBJS) $(META_OBJS)
 
diff --git a/src/meta/Makefile.unix.am b/src/meta/Makefile.unix.am
index fa4b5bcb..75bfbefa 100644
--- a/src/meta/Makefile.unix.am
+++ b/src/meta/Makefile.unix.am
@@ -70,5 +70,6 @@ libmeta_la_SOURCES += ps2_sfs.c
 libmeta_la_SOURCES += sat_dvi.c
 libmeta_la_SOURCES += ps2_bg00.c
 libmeta_la_SOURCES += dc_kcey.c
+libmeta_la_SOURCES += ps2_rstm.c
 
 EXTRA_DIST = meta.h
diff --git a/unix/data.c b/unix/data.c
index 9fcae515..7771effd 100644
--- a/unix/data.c
+++ b/unix/data.c
@@ -87,6 +87,7 @@ gchar *vgmstream_exts [] = {
   "dvi",
   "bg00",
   "kcey",
+  "rstm",
   /* terminator */
   NULL
 };