diff --git a/sys/libkern/iconv.c b/sys/libkern/iconv.c
index 0b92047ec541..b42c043e5e45 100644
--- a/sys/libkern/iconv.c
+++ b/sys/libkern/iconv.c
@@ -168,8 +168,8 @@ iconv_lookupcs(const char *to, const char *from, struct iconv_cspair **cspp)
 	struct iconv_cspair *csp;
 
 	TAILQ_FOREACH(csp, &iconv_cslist, cp_link) {
-		if (strcmp(csp->cp_to, to) == 0 &&
-		    strcmp(csp->cp_from, from) == 0) {
+		if (strcasecmp(csp->cp_to, to) == 0 &&
+		    strcasecmp(csp->cp_from, from) == 0) {
 			if (cspp)
 				*cspp = csp;
 			return 0;
diff --git a/sys/libkern/iconv_ucs.c b/sys/libkern/iconv_ucs.c
index 30810ebab15b..047436de351e 100644
--- a/sys/libkern/iconv_ucs.c
+++ b/sys/libkern/iconv_ucs.c
@@ -102,9 +102,9 @@ iconv_ucs_open(struct iconv_converter_class *dcp,
 	if (cspf)
 		dp->convtype |= KICONV_UCS_COMBINE;
 	for (i = 0; unicode_family[i].name; i++) {
-		if (strcmp(from, unicode_family[i].name) == 0)
+		if (strcasecmp(from, unicode_family[i].name) == 0)
 			dp->convtype |= unicode_family[i].from_flag;
-		if (strcmp(to, unicode_family[i].name) == 0)
+		if (strcasecmp(to, unicode_family[i].name) == 0)
 			dp->convtype |= unicode_family[i].to_flag;
 	}
 	if (strcmp(ENCODING_UNICODE, ENCODING_UTF16) == 0)