1 files changed, 4 insertions, 3 deletions

diff --git a/shared.c b/shared.c
index f7b64cf..609bd2a 100644
--- a/shared.c
+++ b/shared.c
@@ -476,15 +476,16 @@ static int is_token_char(char c)
 static char *expand_macro(char *name, int maxlength)
 {
         char *value;
-        int len;
+        size_t len;
 
         len = 0;
         value = getenv(name);
         if (value) {
-                len = strlen(value);
+                len = strlen(value) + 1;
                 if (len > maxlength)
                         len = maxlength;
-                strncpy(name, value, len);
+                strlcpy(name, value, len);
+                --len;
         }
         return name + len;
 }