diff --git a/expat/lib/internal.h b/expat/lib/internal.h
index 3c5d6e91..e33fdcb0 100644
--- a/expat/lib/internal.h
+++ b/expat/lib/internal.h
@@ -116,7 +116,7 @@ extern "C" {
 
 
 void
-align_limit_to_full_utf8_characters(const char * from, const char ** fromLimRef);
+_INTERNAL_trim_to_complete_utf8_characters(const char * from, const char ** fromLimRef);
 
 
 #ifdef __cplusplus
diff --git a/expat/lib/libexpat.def b/expat/lib/libexpat.def
index aaafb43f..82f80146 100644
--- a/expat/lib/libexpat.def
+++ b/expat/lib/libexpat.def
@@ -74,4 +74,4 @@ EXPORTS
 ; added with version 2.1.1
 ; XML_GetAttributeInfo @66
   XML_SetHashSalt @67@
-  align_limit_to_full_utf8_characters @68@
\ No newline at end of file
+  _INTERNAL_trim_to_complete_utf8_characters @68@
\ No newline at end of file
diff --git a/expat/lib/libexpatw.def b/expat/lib/libexpatw.def
index f28c3efa..75358008 100644
--- a/expat/lib/libexpatw.def
+++ b/expat/lib/libexpatw.def
@@ -74,4 +74,4 @@ EXPORTS
 ; added with version 2.1.1
 ; XML_GetAttributeInfo @66
   XML_SetHashSalt @67@
-  align_limit_to_full_utf8_characters @68@
+  _INTERNAL_trim_to_complete_utf8_characters @68@
diff --git a/expat/lib/xmltok.c b/expat/lib/xmltok.c
index 46924c3a..39b1f642 100644
--- a/expat/lib/xmltok.c
+++ b/expat/lib/xmltok.c
@@ -363,7 +363,7 @@ enum {  /* UTF8_cvalN is value of masked first byte of N byte sequence */
 };
 
 void
-align_limit_to_full_utf8_characters(const char * from, const char ** fromLimRef)
+_INTERNAL_trim_to_complete_utf8_characters(const char * from, const char ** fromLimRef)
 {
   const char * fromLim = *fromLimRef;
   size_t walked = 0;
@@ -416,7 +416,7 @@ utf8_toUtf8(const ENCODING *UNUSED_P(enc),
   /* Avoid copying partial characters (from incomplete input). */
   {
     const char * const fromLimBefore = fromLim;
-    align_limit_to_full_utf8_characters(*fromP, &fromLim);
+    _INTERNAL_trim_to_complete_utf8_characters(*fromP, &fromLim);
     if (fromLim < fromLimBefore) {
       input_incomplete = true;
     }
diff --git a/expat/tests/runtests.c b/expat/tests/runtests.c
index b2b0fa11..72358b75 100644
--- a/expat/tests/runtests.c
+++ b/expat/tests/runtests.c
@@ -757,7 +757,7 @@ START_TEST(test_utf8_auto_align)
         const char * const fromLimInitially = fromLim;
         ptrdiff_t actualMovementInChars;
 
-        align_limit_to_full_utf8_characters(cases[i].input, &fromLim);
+        _INTERNAL_trim_to_complete_utf8_characters(cases[i].input, &fromLim);
 
         actualMovementInChars = (fromLim - fromLimInitially);
         if (actualMovementInChars != cases[i].expectedMovementInChars) {