diff --git a/src/meta/brstm.c b/src/meta/brstm.c
index e326f8de..cc447fc4 100644
--- a/src/meta/brstm.c
+++ b/src/meta/brstm.c
@@ -12,11 +12,18 @@ VGMSTREAM * init_vgmstream_brstm(const char * const filename) {
     int codec_number;
     int channel_count;
     int loop_flag;
+    /* Certain Super Paper Mario tracks have a 44.1KHz sample rate in the
+     * header, but they should be played at 22.05KHz. We will make this
+     * correction if we see a file with a .brstmspm extension. */
+    int spm_flag = 0;
 
     off_t start_offset;
 
     /* check extension, case insensitive */
-    if (strcasecmp("brstm",filename_extension(filename))) goto fail;
+    if (strcasecmp("brstm",filename_extension(filename))) {
+        if (strcasecmp("brstmspm",filename_extension(filename))) goto fail;
+        else spm_flag = 1;
+    }
 
     /* try to open the file for header reading */
     infile = open_streamfile(filename);
@@ -73,6 +80,11 @@ VGMSTREAM * init_vgmstream_brstm(const char * const filename) {
         vgmstream->layout_type = layout_interleave_shortblock;
     vgmstream->meta_type = meta_RSTM;
 
+    if (spm_flag&& vgmstream->sample_rate == 44100) {
+        vgmstream->meta_type = meta_RSTM_SPM;
+        vgmstream->sample_rate = 22050;
+    }
+
     vgmstream->interleave_block_size = read_32bitBE(head_offset+0x38,infile);
     vgmstream->interleave_smallblock_size = read_32bitBE(head_offset+0x48,infile);
 
diff --git a/src/vgmstream.c b/src/vgmstream.c
index db82d050..7719637b 100644
--- a/src/vgmstream.c
+++ b/src/vgmstream.c
@@ -631,6 +631,9 @@ void describe_vgmstream(VGMSTREAM * vgmstream, char * desc, int length) {
         case meta_DSP_GCM:
             snprintf(temp,TEMPSIZE,"Double DSP header stereo by .gcm extension");
             break;
+        case meta_RSTM_SPM:
+            snprintf(temp,TEMPSIZE,"Nintendo RSTM header and .brstmspm extension");
+            break;
         default:
             snprintf(temp,TEMPSIZE,"THEY SHOULD HAVE SENT A POET");
     }
diff --git a/src/vgmstream.h b/src/vgmstream.h
index ad65d5bb..07b36ddc 100644
--- a/src/vgmstream.h
+++ b/src/vgmstream.h
@@ -66,6 +66,7 @@ typedef enum {
     meta_AFC,               /* AFC */
     meta_AST,               /* AST */
     meta_RWSD,              /* single-stream RWSD */
+    meta_RSTM_SPM,          /* RSTM with 44->22khz hack */
     /* CRI ADX */
     meta_ADX_03,            /* ADX "type 03" */
     meta_ADX_04,            /* ADX "type 04" */
diff --git a/winamp/in_vgmstream.c b/winamp/in_vgmstream.c
index a5571df4..0bfac343 100644
--- a/winamp/in_vgmstream.c
+++ b/winamp/in_vgmstream.c
@@ -74,7 +74,7 @@ char * extension_list[EXTENSION_COUNT] = {
     "afc\0AFC Audio File (*.AFC)\0",
     "agsc\0AGSC Audio File (*.AGSC)\0",
     "ast\0AST Audio File (*.AST)\0",
-    "brstm\0BRSTM Audio File (*.BRSTM)\0",
+    "brstm;brstmspm\0BRSTM Audio File (*.BRSTM)\0",
     "hps\0HALPST Audio File (*.HPS)\0",
     "strm\0STRM Audio File (*.STRM)\0",
     "adp\0ADP Audio File (*.ADP)\0",