diff --git a/src/main.c b/src/main.c
index e2534e9..2914ec2 100644
--- a/src/main.c
+++ b/src/main.c
@@ -253,7 +253,8 @@ void scrotCheckIfOverwriteFile(char** filename)
             strlcpy(newName + slen, fmt, 5);
         else {
             strncpy((newName + slen) - extLength, fmt, 5);
-            strncat(newName, ext, extLength);
+            char *ptr = &newName[0] + extLength;
+            *ptr = '\0';
         }
         curFile = newName;
     } while ((counter < maxCounter) && !access(curFile, F_OK));