diff --git a/src/if_perl.xs b/src/if_perl.xs
index 9ac9907..118f604 100644
--- a/src/if_perl.xs
+++ b/src/if_perl.xs
@@ -67,6 +67,10 @@
 # define PERL5101_OR_LATER
 #endif
 
+#if (PERL_REVISION == 5) && (PERL_VERSION >= 18)
+# define PERL5180_OR_LATER
+#endif
+
 #ifndef pTHX
 #    define pTHX void
 #    define pTHX_
@@ -127,9 +131,11 @@
 # define perl_free dll_perl_free
 # define Perl_get_context dll_Perl_get_context
 # define Perl_croak dll_Perl_croak
+# ifndef PERL5180_OR_LATER
 # ifdef PERL5101_OR_LATER
 #  define Perl_croak_xs_usage dll_Perl_croak_xs_usage
 # endif
+# endif
 # ifndef PROTO
 #  define Perl_croak_nocontext dll_Perl_croak_nocontext
 #  define Perl_call_argv dll_Perl_call_argv
@@ -242,9 +248,11 @@
 static int (*perl_parse)(PerlInterpreter*, XSINIT_t, int, char**, char**);
 static void* (*Perl_get_context)(void);
 static void (*Perl_croak)(pTHX_ const char*, ...);
+#ifndef PERL5180_OR_LATER
 #ifdef PERL5101_OR_LATER
 static void (*Perl_croak_xs_usage)(pTHX_ const CV *const, const char *const params);
 #endif
+#endif
 static void (*Perl_croak_nocontext)(const char*, ...);
 static I32 (*Perl_dowantarray)(pTHX);
 static void (*Perl_free_tmps)(pTHX);
@@ -362,9 +370,11 @@
     {"perl_parse", (PERL_PROC*)&perl_parse},
     {"Perl_get_context", (PERL_PROC*)&Perl_get_context},
     {"Perl_croak", (PERL_PROC*)&Perl_croak},
+#ifndef PERL5180_OR_LATER
 #ifdef PERL5101_OR_LATER
     {"Perl_croak_xs_usage", (PERL_PROC*)&Perl_croak_xs_usage},
 #endif
+#endif
     {"Perl_croak_nocontext", (PERL_PROC*)&Perl_croak_nocontext},
     {"Perl_dowantarray", (PERL_PROC*)&Perl_dowantarray},
     {"Perl_free_tmps", (PERL_PROC*)&Perl_free_tmps},
diff --git a/src/version.c b/src/version.c
index ca687c7..8f4ddcf 100644
--- a/src/version.c
+++ b/src/version.c
@@ -729,6 +729,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    1198,
+/**/
     1197,
 /**/
     1196,