diff --git a/src/speexenc.c b/src/speexenc.c
index 1beec999ffbcce58867f10171a93bce555d06bd8..acca976763e5178bd9868e03ec9b26d263c35712 100644
--- a/src/speexenc.c
+++ b/src/speexenc.c
@@ -574,7 +574,7 @@ int main(int argc, char **argv)
 		  perror("short file");
 		  exit(1);
 	  }
-      if (strncmp(first_bytes,"RIFF",4)==0 && strncmp(first_bytes,"RIFF",4)==0)
+      if (strncmp(first_bytes,"RIFF",4)==0 || strncmp(first_bytes,"riff",4)==0)
       {
          if (read_wav_header(fin, &rate, &chan, &fmt, &size)==-1)
             exit(1);