diff --git a/res/res_format_attr_h263.c b/res/res_format_attr_h263.c
index 139fbf17aa..a32f40f7d5 100644
--- a/res/res_format_attr_h263.c
+++ b/res/res_format_attr_h263.c
@@ -156,6 +156,8 @@ static struct ast_format *h263_parse_sdp_fmtp(const struct ast_format *format, c
 	while ((attrib = strsep(&attribs, ";"))) {
 		unsigned int val, val2 = 0, val3 = 0, val4 = 0;
 
+		attrib = ast_strip(attrib);
+
 		if (sscanf(attrib, "SQCIF=%30u", &val) == 1) {
 			attr->SQCIF = val;
 		} else if (sscanf(attrib, "QCIF=%30u", &val) == 1) {
diff --git a/res/res_format_attr_h264.c b/res/res_format_attr_h264.c
index 29d495bc77..fa3339543b 100644
--- a/res/res_format_attr_h264.c
+++ b/res/res_format_attr_h264.c
@@ -184,6 +184,8 @@ static struct ast_format *h264_parse_sdp_fmtp(const struct ast_format *format, c
 		unsigned int val;
 		unsigned long int val2;
 
+		attrib = ast_strip(attrib);
+
 		if (sscanf(attrib, "profile-level-id=%lx", &val2) == 1) {
 			attr->PROFILE_IDC = ((val2 >> 16) & 0xFF);
 			attr->PROFILE_IOP = ((val2 >> 8) & 0xFF);