diff --git a/sc2/src/sc2code/libs/sound/decoders/dukaud.c b/sc2/src/sc2code/libs/sound/decoders/dukaud.c
index 5d4b604e5..01c5c8161 100644
--- a/sc2/src/sc2code/libs/sound/decoders/dukaud.c
+++ b/sc2/src/sc2code/libs/sound/decoders/dukaud.c
@@ -111,7 +111,12 @@ duka_readAudFrameHeader (TFB_DuckSoundDecoder* duka, uint32 iframe,
 {
 	DukAud_FrameHeader hdr;
 
-	uio_fseek (duka->duk, duka->frames[iframe], SEEK_SET);
+	if (uio_fseek (duka->duk, duka->frames[iframe], SEEK_SET) == -1)
+	{
+		duka->last_error = errno;
+		return dukae_BadFile;
+	}
+	
 	if (uio_fread (&hdr, sizeof(hdr), 1, duka->duk) != 1)
 	{
 		duka->last_error = errno;
@@ -280,7 +285,12 @@ duka_readNextFrame (TFB_DuckSoundDecoder* duka)
 	DukAud_AudSubframe* aud;
 	uint8* p;
 
-	uio_fseek (duka->duk, duka->frames[duka->iframe], SEEK_SET);
+	if (uio_fseek (duka->duk, duka->frames[duka->iframe], SEEK_SET) == -1)
+	{
+		duka->last_error = errno;
+		return dukae_BadFile;
+	}
+
 	if (uio_fread (&hdr, sizeof(hdr), 1, duka->duk) != 1)
 	{
 		duka->last_error = errno;