1 files changed, 5 insertions, 3 deletions

diff --git a/firmware/common/strnatcmp.c b/firmware/common/strnatcmp.c
index 3c98200f7e..09c331f914 100644
--- a/firmware/common/strnatcmp.c
+++ b/firmware/common/strnatcmp.c
@@ -67,8 +67,10 @@ nat_isspace(int a)
 #endif
 
 static inline int
-nat_toupper(int a)
+nat_unify_case(int a)
 {
+     /* We use 'tolower' and not 'toupper' so that '_' gets sorted
+        before the letters */
      return tolower(a);
 }
 
@@ -170,8 +172,8 @@ static int strnatcmp0(char const *a, char const *b, int fold_case)
           }
 
           if (fold_case) {
-               ca = nat_toupper(ca);
-               cb = nat_toupper(cb);
+               ca = nat_unify_case(ca);
+               cb = nat_unify_case(cb);
           }
           
           if (ca < cb)