diff --git a/include/h.h b/include/h.h
index 5959d230b..9563772ec 100644
--- a/include/h.h
+++ b/include/h.h
@@ -711,7 +711,7 @@ extern char *unreal_time_synch_error(void);
 extern int unreal_time_synch(int timeout);
 extern int extban_is_banned_helper(char *buf);
 extern char *getcloak(aClient *sptr);
-extern unsigned char param_to_slot_mapping[256];
+extern MODVAR unsigned char param_to_slot_mapping[256];
 extern char *cm_getparameter(aChannel *chptr, char mode);
 extern void cm_putparameter(aChannel *chptr, char mode, char *str);
 extern void cm_freeparameter(aChannel *chptr, char mode);
@@ -753,6 +753,6 @@ extern char *our_strcasestr(char *haystack, char *needle);
 extern void update_conf(void);
 extern MODVAR int need_34_upgrade;
 #ifdef _WIN32
-extern BOOL IsService;
+extern MODVAR BOOL IsService;
 #endif
 extern int match_ip46(char *a, char *b);
diff --git a/src/extcmodes.c b/src/extcmodes.c
index 34fc93c66..e23403a67 100644
--- a/src/extcmodes.c
+++ b/src/extcmodes.c
@@ -45,7 +45,7 @@
 extern char cmodestring[512];
 
 /* Channel parameter to slot# mapping */
-unsigned char param_to_slot_mapping[256];
+MODVAR unsigned char param_to_slot_mapping[256];
 
 extern void make_cmodestr(void);
 
diff --git a/src/ircd.c b/src/ircd.c
index 72d143382..9e948d22b 100644
--- a/src/ircd.c
+++ b/src/ircd.c
@@ -104,7 +104,7 @@ extern SERVICE_STATUS_HANDLE IRCDStatusHandle;
 extern SERVICE_STATUS IRCDStatus;
 #endif
 
-unsigned char conf_debuglevel = 0;
+MODVAR unsigned char conf_debuglevel = 0;
 
 #ifdef USE_LIBCURL
 extern void url_init(void);
diff --git a/src/win32/service.c b/src/win32/service.c
index 8adafd32a..bfb739573 100644
--- a/src/win32/service.c
+++ b/src/win32/service.c
@@ -33,7 +33,7 @@ SERVICE_STATUS_HANDLE IRCDStatusHandle;
 /* Signal to rehash */
 #define IRCD_SERVICE_CONTROL_REHASH 128
 
-BOOL IsService = FALSE;
+MODVAR BOOL IsService = FALSE;
 
 extern OSVERSIONINFO VerInfo;
 #define WIN32_VERSION BASE_VERSION PATCH1 PATCH2 PATCH3 PATCH4 PATCH5