diff --git a/src/libexim-kitencrypt-dlfunc.h b/src/libexim-kitencrypt-dlfunc.h
deleted file mode 100644
index d038604..0000000
--- a/src/libexim-kitencrypt-dlfunc.h
+++ /dev/null
@@ -1,7 +0,0 @@
-#ifndef EXIM_ENCRYPT_LIBRARY_H
-#define EXIM_ENCRYPT_LIBRARY_H
-
-extern int kitencrypt(uschar **yield, int argc, uschar *argv[]);
-
-#endif //EXIM_ENCRYPT_LIBRARY_H
-