Index: src/cleanup/cleanup_message.c
===================================================================
--- src/cleanup/cleanup_message.c.orig
+++ src/cleanup/cleanup_message.c
@@ -296,7 +296,7 @@ static const char *cleanup_act(CLEANUP_S
     while (*optional_text && ISSPACE(*optional_text))
 	optional_text++;
 
-#define STREQUAL(x,y,l) (strncasecmp((x), (y), (l)) == 0 && (y)[l] == 0)
+inline int STREQUAL(const char *x, const char *y, size_t l) { return (strncasecmp((x), (y), (l)) == 0 && (y)[l] == 0); }
 #define CLEANUP_ACT_DROP 0
 
     /*
Index: src/local/local_expand.c
===================================================================
--- src/local/local_expand.c.orig
+++ src/local/local_expand.c
@@ -115,7 +115,7 @@ static const char *local_expand_lookup(c
     LOCAL_EXP *local = (LOCAL_EXP *) ptr;
     static char rcpt_delim[2];
 
-#define STREQ(x,y) (*(x) == *(y) && strcmp((x), (y)) == 0)
+inline int STREQ(const char *x, const char *y) { return (*(x) == *(y) && strcmp((x), (y)) == 0); }
 
     if (STREQ(name, "user")) {
 	return (local->state->msg_attr.user);
Index: src/smtpd/smtpd_check.c
===================================================================
--- src/smtpd/smtpd_check.c.orig
+++ src/smtpd/smtpd_check.c
@@ -380,6 +380,10 @@ static STRING_LIST *smtpd_acl_perm_log;
 #define CONST_STR(x)	((const char *) vstring_str(x))
 #define UPDATE_STRING(ptr,val) { if (ptr) myfree(ptr); ptr = mystrdup(val); }
 
+inline int STREQ(const char *x, const char *y) { return (*(x) == *(y) && strcmp((x), (y)) == 0); }
+inline int STREQUAL(const char *x, const char *y, size_t l) { return (strncasecmp((x), (y), (l)) == 0 && (y)[l] == 0); }
+inline int STREQN(const char *x, const char *y, size_t n) { return (*(x) == *(y) && strncmp((x), (y), (n)) == 0); }
+
  /*
   * If some decision can't be made due to a temporary error, then change
   * other decisions into deferrals.
@@ -2339,8 +2343,6 @@ static int check_table_result(SMTPD_STAT
     if (msg_verbose)
 	msg_info("%s: %s %s %s", myname, table, value, datum);
 
-#define STREQUAL(x,y,l) (strncasecmp((x), (y), (l)) == 0 && (y)[l] == 0)
-
     /*
      * DUNNO means skip this table. Silently ignore optional text.
      */
@@ -3375,8 +3377,6 @@ static const char *rbl_expand_lookup(con
     SMTPD_RBL_EXPAND_CONTEXT *rbl_exp = (SMTPD_RBL_EXPAND_CONTEXT *) context;
     SMTPD_STATE *state = rbl_exp->state;
 
-#define STREQ(x,y) (*(x) == *(y) && strcmp((x), (y)) == 0)
-
     if (state->expand_buf == 0)
 	state->expand_buf = vstring_alloc(10);