diff --git a/src/doskbd.c b/src/doskbd.c
index 0d204f3..6a800fc 100644
--- a/src/doskbd.c
+++ b/src/doskbd.c
@@ -33,7 +33,6 @@ int nokbdflag = FALSE;
 extern int eurokbd;
 extern KbdInterface currentkbd;
 extern MouseInterface currentmouse;
-extern IFPAGE *InterfacePage;
 extern int KBDEventFlg;
 
 extern keybuffer *CTopKeyevent;
diff --git a/src/dosmouse.c b/src/dosmouse.c
index ffd90b6..9dbdf55 100644
--- a/src/dosmouse.c
+++ b/src/dosmouse.c
@@ -28,7 +28,6 @@
 #include "miscstat.h"
 
 extern int eurokbd;
-extern IFPAGE *InterfacePage;
 extern int KBDEventFlg;
 extern DspInterface currentdsp;
 extern MouseInterface currentmouse;
diff --git a/src/initdsp.c b/src/initdsp.c
index 63216bb..9e1ed17 100644
--- a/src/initdsp.c
+++ b/src/initdsp.c
@@ -71,7 +71,6 @@ DLword *DISP_MAX_Address;
 
 
 extern DLword *EmCursorBitMap68K;
-extern IFPAGE *InterfacePage;
 
 int DebugDSP = T;
 
diff --git a/src/keyevent.c b/src/keyevent.c
index 4a31f4e..d2b4893 100644
--- a/src/keyevent.c
+++ b/src/keyevent.c
@@ -49,8 +49,6 @@ void Mouse_hndlr(void); /* Fields mouse events from driver        */
 #include "display.h"
 #include "lsptypes.h"
 
-#include "ifpage.h"
-
 #include "bb.h"
 #include "bitblt.h"
 #include "pilotbbt.h"
@@ -307,7 +305,6 @@ void process_io_events(void)
 
 void kb_trans(u_short keycode, u_short upflg)
 {
-  extern IFPAGE *InterfacePage;
   if (keycode < 64) /* DLKBDAD0 ~ 3	*/
   {
     PUTBASEBIT68K(EmKbdAd068K, keycode, upflg);
diff --git a/src/mkatom.c b/src/mkatom.c
index 526f890..eec68cf 100644
--- a/src/mkatom.c
+++ b/src/mkatom.c
@@ -37,6 +37,7 @@
 #include "cell.h"        // for PNCell, GetPnameCell
 #include "dbprint.h"     // for DBPRINT
 #include "lispemul.h"    // for DLword, LispPTR, T, NIL, POINTERMASK
+#include "lspglob.h"     // for AtomHT
 #include "lispmap.h"     // for S_POSITIVE
 #include "lsptypes.h"    // for GETBYTE, GETWORD
 #include "mkatomdefs.h"  // for compare_chars, compare_lisp_chars, compute_hash
@@ -260,10 +261,6 @@ LispPTR compare_lisp_chars(const char *char1, const char *char2, DLword length,
 
 LispPTR make_atom(const char *char_base, DLword offset, DLword length)
 {
-  extern DLword *AtomHT;
-  extern DLword *Pnamespace;
-  extern DLword *AtomSpace;
-
   DLword hash;
   LispPTR hash_entry; /* hash entry contents */
   DLword atom_index;
diff --git a/src/storage.c b/src/storage.c
index 8ec6165..0ca44f8 100644
--- a/src/storage.c
+++ b/src/storage.c
@@ -287,9 +287,6 @@ LispPTR newpage(LispPTR base) {
 #endif /* BIGVM */
 
   INTSTAT *int_state;
-
-  extern LispPTR *LASTVMEMFILEPAGE_word;
-  extern LispPTR *VMEM_FULL_STATE_word;
   unsigned int nactive;
 
   vp = base >> 8; /* Compute virtual-page # from Lisp address of the page */
diff --git a/src/testtool.c b/src/testtool.c
index 00e172b..7ec32a6 100644
--- a/src/testtool.c
+++ b/src/testtool.c
@@ -55,7 +55,6 @@
 #include "debug.h"         // for PACKAGE
 #include "emlglob.h"
 #include "gcarraydefs.h"   // for aref1
-#include "ifpage.h"        // for IFPAGE
 #include "kprintdefs.h"    // for print, prindatum
 #include "lispemul.h"      // for DLword, LispPTR, DLbyte, state, T, ConsCell
 #include "lispmap.h"       // for STK_OFFSET, ATOMS_HI
@@ -190,7 +189,6 @@ void print_package_name(int index) {
 /************************************************************************/
 
 void dump_dtd(void) {
-  extern DLword *DTDspace;
   struct dtd *dtdp;
   DLword cnt;
 
@@ -1102,7 +1100,6 @@ void all_stack_dump(DLword start, DLword end, DLword silent)
   DLword *start68k, *end68k, *orig68k;
   DLword size;
   int sdlines = 0;
-  extern IFPAGE *InterfacePage;
 
   if (start == 0)
     start68k = Stackspace + InterfacePage->stackbase;
diff --git a/src/vmemsave.c b/src/vmemsave.c
index ca487e5..c69bc7e 100644
--- a/src/vmemsave.c
+++ b/src/vmemsave.c
@@ -42,7 +42,6 @@
 #include "lispemul.h"
 #include "lispmap.h"
 #include "lspglob.h"
-#include "ifpage.h"
 #include "vmemsave.h"
 #include "timeout.h"
 #include "adr68k.h"
@@ -72,7 +71,6 @@
 extern int LispWindowFd;
 extern struct pixrect *CursorBitMap, *InvisibleCursorBitMap;
 extern struct cursor CurrentCursor, InvisibleCursor;
-extern IFPAGE *InterfacePage;
 #ifdef DOS
 extern DspInterface currentdsp;
 #endif /* DOS */
@@ -513,8 +511,6 @@ LispPTR vmem_save(char *sysout_file_name)
 /*									*/
 /************************************************************************/
 
-extern int UnixPID;
-
 /* Make sure that we kill off any Unix subprocesses before we go away */
 
 void lisp_finish(void) {
diff --git a/src/xc.c b/src/xc.c
index 4655bb0..e6133c2 100644
--- a/src/xc.c
+++ b/src/xc.c
@@ -1094,7 +1094,6 @@ check_interrupt:
     extern LispPTR *PERIODIC_INTERRUPT68k;
     extern LispPTR *PERIODIC_INTERRUPT_FREQUENCY68k;
     extern LispPTR PERIODIC_INTERRUPTFRAME_index;
-    extern LispPTR *Reclaim_cnt_word;
     extern LispPTR DORECLAIM_index;
     extern int URaid_req;