diff --git a/lib/stdlib/strcmp.c b/lib/stdlib/strcmp.c
index 1d26f2b..bb86e0f 100644
--- a/lib/stdlib/strcmp.c
+++ b/lib/stdlib/strcmp.c
@@ -36,6 +36,7 @@
  */
 
 #include <sys/cdefs.h>
+#include <sys/ctype.h>
 #include <string.h>
 
 /*
@@ -49,3 +50,17 @@
 			return 0;
 	return *(const unsigned char *)s1 - *(const unsigned char *)(s2 - 1);
 }
+
+int
+strcasecmp(const char *s1, const char *s2)
+{
+	const unsigned char *us1 = (const unsigned char *)s1;
+	const unsigned char *us2 = (const unsigned char *)s2;
+
+	while (tolower(*us1) == tolower(*us2)) {
+		if (*us1++ == '\0')
+			return 0;
+		us2++;
+	}
+	return tolower(*us1) - tolower(*us2);
+}