diff --git a/src/Delegate.c b/src/Delegate.c
index 07e155e..3547587 100644
--- a/src/Delegate.c
+++ b/src/Delegate.c
@@ -5,6 +5,7 @@
 
 #include <Defs.h>
 #include <Data.h>
+#include <errno.h>
 
 char* Suffixate(char* String, char Suffix) {
     char* Pos, *NewStr;