diff --git a/demod/mod/demod_mod.c b/demod/mod/demod_mod.c
index 529796f..51e3538 100644
--- a/demod/mod/demod_mod.c
+++ b/demod/mod/demod_mod.c
@@ -257,11 +257,13 @@ float read_wav_header(pcm_t *pcm, FILE *fp) {
     int sample_rate = 0, bits_sample = 0, channels = 0;
 
     if (fread(txt, 1, 4, fp) < 4) return -1;
-    if (strncmp(txt, "RIFF", 4)) return -1;
+    if (strncmp(txt, "RIFF", 4) && strncmp(txt, "RF64", 4)) return -1;
+
     if (fread(txt, 1, 4, fp) < 4) return -1;
     // pos_WAVE = 8L
     if (fread(txt, 1, 4, fp) < 4) return -1;
-    if (strncmp(txt, "WAVE", 4)) return -1;
+    if (strncmp(txt, "WAVE", 4))  return -1;
+
     // pos_fmt = 12L
     for ( ; ; ) {
         if ( (byte=fgetc(fp)) == EOF ) return -1;
diff --git a/demod/multi/demod_base.c b/demod/multi/demod_base.c
index c95c9f4..9a68d94 100644
--- a/demod/multi/demod_base.c
+++ b/demod/multi/demod_base.c
@@ -256,11 +256,13 @@ float read_wav_header(pcm_t *pcm) {
     int sample_rate = 0, bits_sample = 0, channels = 0;
 
     if (fread(txt, 1, 4, fp) < 4) return -1;
-    if (strncmp(txt, "RIFF", 4)) return -1;
+    if (strncmp(txt, "RIFF", 4) && strncmp(txt, "RF64", 4)) return -1;
+
     if (fread(txt, 1, 4, fp) < 4) return -1;
     // pos_WAVE = 8L
     if (fread(txt, 1, 4, fp) < 4) return -1;
-    if (strncmp(txt, "WAVE", 4)) return -1;
+    if (strncmp(txt, "WAVE", 4))  return -1;
+
     // pos_fmt = 12L
     for ( ; ; ) {
         if ( (byte=fgetc(fp)) == EOF ) return -1;
diff --git a/scan/dft_detect.c b/scan/dft_detect.c
index 8feb325..e3b7046 100644
--- a/scan/dft_detect.c
+++ b/scan/dft_detect.c
@@ -386,11 +386,13 @@ static int read_wav_header(FILE *fp, int wav_channel) {
     int byte, p=0;
 
     if (fread(txt, 1, 4, fp) < 4) return -1;
-    if (strncmp(txt, "RIFF", 4)) return -1;
+    if (strncmp(txt, "RIFF", 4) && strncmp(txt, "RF64", 4)) return -1;
+
     if (fread(txt, 1, 4, fp) < 4) return -1;
     // pos_WAVE = 8L
     if (fread(txt, 1, 4, fp) < 4) return -1;
-    if (strncmp(txt, "WAVE", 4)) return -1;
+    if (strncmp(txt, "WAVE", 4))  return -1;
+
     // pos_fmt = 12L
     for ( ; ; ) {
         if ( (byte=fgetc(fp)) == EOF ) return -1;