diff --git a/inc/dspsubrs.h b/inc/dspsubrs.h
new file mode 100644
index 0000000..2e157fc
--- /dev/null
+++ b/inc/dspsubrs.h
@@ -0,0 +1,8 @@
+void DSP_dspbout(LispPTR *args);
+void DSP_showdisplay(LispPTR *args);
+LispPTR DSP_VideoColor(LispPTR *args);
+void DSP_Cursor(LispPTR *args, int argnum);
+void DSP_SetMousePos(register LispPTR *args);
+LispPTR DSP_ScreenWidth(LispPTR *args);
+LispPTR DSP_ScreenHight(LispPTR *args);
+void flip_cursor();
diff --git a/src/gcr.c b/src/gcr.c
index 55cf832..c81a393 100644
--- a/src/gcr.c
+++ b/src/gcr.c
@@ -66,6 +66,7 @@ static char *id = "$Id: gcr.c,v 1.3 1999/05/31 23:35:32 sybalsky Exp $ Copyright
 #include "adr68k.h"
 #include "lspglob.h"
 #include "stack.h"
+#include "dspsubrs.h"
 #include "gc.h"
 
 #define MAXSMALLP 65535
diff --git a/src/subr.c b/src/subr.c
index 4cbf9ac..b95736c 100644
--- a/src/subr.c
+++ b/src/subr.c
@@ -51,6 +51,7 @@ static char *id = "$Id: subr.c,v 1.3 1999/05/31 23:35:42 sybalsky Exp $ Copyrigh
 #include "ufs.h"
 #include "dir.h"
 #include "chardev.h"
+#include "dspsubrs.h"
 
 extern LispPTR *PENDINGINTERRUPT68k;