diff --git a/firmware/common/strcasecmp.c b/firmware/common/strcasecmp.c
index b9dd6c13c4..cdfbe2f81a 100644
--- a/firmware/common/strcasecmp.c
+++ b/firmware/common/strcasecmp.c
@@ -2,6 +2,7 @@
 #include <string.h>
 #include <ctype.h>
 
+#ifndef strcasecmp
 int strcasecmp(const char *s1, const char *s2)
 {
     while (*s1 != '\0' && tolower(*s1) == tolower(*s2)) {
@@ -11,7 +12,9 @@ int strcasecmp(const char *s1, const char *s2)
 
     return tolower(*(unsigned char *) s1) - tolower(*(unsigned char *) s2);
 }
+#endif
 
+#ifndef strncasecmp
 int strncasecmp(const char *s1, const char *s2, size_t n)
 {
     int d = 0;
@@ -26,3 +29,4 @@ int strncasecmp(const char *s1, const char *s2, size_t n)
     
     return d;
 }
+#endif