1 files changed, 5 insertions, 1 deletions
diff --git a/handy.h b/handy.h
index 9bee70b51f..6936c20df0 100644
--- a/handy.h
+++ b/handy.h
@@ -502,7 +502,11 @@ Converts the specified character to lowercase.
 #define isBLANK_LC_utf8(c)	isBLANK(c) /* could be wrong */
 
 #ifdef EBCDIC
-#  define toCTRL(c)	Perl_ebcdic_control(c)
+#  ifdef PERL_IMPLICIT_CONTEXT
+#    define toCTRL(c)     Perl_ebcdic_control(aTHX_ c)
+#  else
+#    define toCTRL        Perl_ebcdic_control
+#  endif
 #else
   /* This conversion works both ways, strangely enough. */
 #  define toCTRL(c)    (toUPPER(c) ^ 64)