diff --git a/mypyc/lib-rt/getargs.c b/mypyc/lib-rt/getargs.c
index 3c8b528f8048..1bc2f5b02ba8 100644
--- a/mypyc/lib-rt/getargs.c
+++ b/mypyc/lib-rt/getargs.c
@@ -395,7 +395,7 @@ vgetargskeywords(PyObject *args, PyObject *kwargs, const char *format,
                 goto latefail;
             }
             for (i = pos; i < len; i++) {
-                if (CPyUnicode_EqualToASCIIString(key, kwlist[i])) {
+                if (PyUnicode_EqualToUTF8(key, kwlist[i])) {
                     match = 1;
                     break;
                 }
diff --git a/mypyc/lib-rt/pythonsupport.h b/mypyc/lib-rt/pythonsupport.h
index 2d18e19b2c56..85eb6348eb81 100644
--- a/mypyc/lib-rt/pythonsupport.h
+++ b/mypyc/lib-rt/pythonsupport.h
@@ -307,8 +307,6 @@ list_count(PyListObject *self, PyObject *value)
     return CPyTagged_ShortFromSsize_t(count);
 }
 
-#define CPyUnicode_EqualToASCIIString(x, y) _PyUnicode_EqualToASCIIString(x, y)
-
 // Adapted from genobject.c in Python 3.7.2
 // Copied because it wasn't in 3.5.2 and it is undocumented anyways.
 /*