X-Git-Url: https://sigrok.org/gitweb/?a=blobdiff_plain;f=src%2Finput%2Fwav.c;h=4f36e8c45126aac8791a55ddef31563bab0db2cc;hb=c11a1e6122998b247df66c59d2076eb814818497;hp=271bacef19b9162aed32ab396a347579cbcee87b;hpb=76598cda5465e74e7427b5613f5859f02c2d2ad6;p=libsigrok.git

diff --git a/src/input/wav.c b/src/input/wav.c
index 271bacef..4f36e8c4 100644
--- a/src/input/wav.c
+++ b/src/input/wav.c
@@ -165,8 +165,7 @@ static int find_data_chunk(GString *buf, int initial_offset)
 			/* Skip into the samples. */
 			return offset + 8;
 		for (i = 0; i < 4; i++) {
-			if (!isalpha(buf->str[offset + i])
-					&& !isascii(buf->str[offset + i])
+			if (!isalnum(buf->str[offset + i])
 					&& !isblank(buf->str[offset + i]))
 				/* Doesn't look like a chunk ID. */
 				return -1;