1 files changed, 4 insertions, 1 deletions
diff --git a/prism/encoding.c b/prism/encoding.c
index 2210d71411..bdb9958e97 100644
--- a/prism/encoding.c
+++ b/prism/encoding.c
@@ -2277,7 +2277,10 @@ pm_utf_8_codepoint(const uint8_t *b, ptrdiff_t n, size_t *width) {
     return 0;
 }
 
-static size_t
+/**
+ * Return the size of the next character in the UTF-8 encoding.
+ */
+size_t
 pm_encoding_utf_8_char_width(const uint8_t *b, ptrdiff_t n) {
     size_t width;
     pm_utf_8_codepoint(b, n, &width);