diff --git a/gen/scriptmap.go b/gen/scriptmap.go
index 488b8b3..a4a85c6 100644
--- a/gen/scriptmap.go
+++ b/gen/scriptmap.go
@@ -86,7 +86,7 @@ func writeMap(d *scriptdata, m []*scriptmap, filename string) error {
 
 	w.WriteString(header)
 	w.WriteString(
-		"#include \"convert.h\"\n" +
+		"#include \"src/convert.h\"\n" +
 			"int GetCharmap(int script, int region) {\n" +
 			"switch (script) {\n")
 	for _, s := range m {
diff --git a/src/BUILD.bazel b/src/BUILD.bazel
index ead3393..d1a620e 100644
--- a/src/BUILD.bazel
+++ b/src/BUILD.bazel
@@ -31,6 +31,8 @@ genrule(
 cc_library(
     name = "convert",
     srcs = [
+        "charmap.c",
+        "convert.h",
         "defs.h",
         "toolbox.c",
     ],
diff --git a/src/convert.h b/src/convert.h
new file mode 100644
index 0000000..b5ada64
--- /dev/null
+++ b/src/convert.h
@@ -0,0 +1,9 @@
+#ifndef convert_h
+#define convert_h
+/* convert.h - character set conversion routines. */
+
+/* Get the character map used for the given Mac OS script and region codes.
+   Return -1 if no known character map exists. */
+int GetCharmap(int script, int region);
+
+#endif