diff --git a/doc/fcstring.fncs b/doc/fcstring.fncs
index 0412bbd..d5ec043 100644
--- a/doc/fcstring.fncs
+++ b/doc/fcstring.fncs
@@ -223,6 +223,18 @@ This is just a wrapper around free(3) which helps track memory usage of
 strings within the fontconfig library.
 @@
 
+@RET@		FcChar8 *
+@FUNC@		FcStrBuildFilename
+@TYPE1@		const FcChar8 *			@ARG1@		path
+@TYPE2@		...
+@PURPOSE@	Concatenate strings as a file path
+@DESC@
+Creates a filename from the given elements of strings as file paths
+and concatenate them with the appropriate file separator.
+Arguments must be null-terminated.
+This returns a newly-allocated memory which should be freed when no longer needed.
+@@
+
 @RET@		FcChar8 *
 @FUNC@		FcStrDirname
 @TYPE1@		const FcChar8 *			@ARG1@		file
diff --git a/fontconfig/fontconfig.h b/fontconfig/fontconfig.h
index bac1dda..af870d0 100644
--- a/fontconfig/fontconfig.h
+++ b/fontconfig/fontconfig.h
@@ -1076,6 +1076,10 @@ FcUtf16Len (const FcChar8   *string,
 	    int		    *nchar,
 	    int		    *wchar);
 
+FcPublic FcChar8 *
+FcStrBuildFilename (const FcChar8 *path,
+		    ...);
+
 FcPublic FcChar8 *
 FcStrDirname (const FcChar8 *file);
 
diff --git a/src/fcint.h b/src/fcint.h
index de78cd8..a9d075a 100644
--- a/src/fcint.h
+++ b/src/fcint.h
@@ -1282,10 +1282,6 @@ FcStrUsesHome (const FcChar8 *s);
 FcPrivate FcBool
 FcStrIsAbsoluteFilename (const FcChar8 *s);
 
-FcPrivate FcChar8 *
-FcStrBuildFilename (const FcChar8 *path,
-		    ...);
-
 FcPrivate FcChar8 *
 FcStrLastSlash (const FcChar8  *path);
 
diff --git a/test/test-bz106632.c b/test/test-bz106632.c
index daa0c1e..2d67c2e 100644
--- a/test/test-bz106632.c
+++ b/test/test-bz106632.c
@@ -25,25 +25,26 @@
 #ifdef HAVE_CONFIG_H
 #include "config.h"
 #endif
+#include <stdio.h>
 #include <stdlib.h>
+#include <string.h>
 #include <dirent.h>
+#include <unistd.h>
+#include <errno.h>
 #ifndef HAVE_STRUCT_DIRENT_D_TYPE
 #include <sys/types.h>
 #include <sys/stat.h>
-#include <unistd.h>
 #endif
-#include "fcstr.c"
-#undef FcConfigBuildFonts
-#undef FcConfigCreate
-#undef FcConfigGetCurrent
-#undef FcConfigParseAndLoadFromMemory
-#undef FcConfigUptoDate
-#undef FcFontList
-#undef FcInitReinitialize
-#undef FcPatternCreate
-#undef FcPatternDestroy
 #include <fontconfig/fontconfig.h>
 
+#ifdef _WIN32
+#  define FC_DIR_SEPARATOR         '\\'
+#  define FC_DIR_SEPARATOR_S       "\\"
+#else
+#  define FC_DIR_SEPARATOR         '/'
+#  define FC_DIR_SEPARATOR_S       "/"
+#endif
+
 #ifdef HAVE_MKDTEMP
 #define fc_mkdtemp	mkdtemp
 #else
@@ -154,18 +155,6 @@ unlink_dirs (const char *dir)
     return ret;
 }
 
-FcChar8 *
-FcLangNormalize (const FcChar8 *lang)
-{
-    return NULL;
-}
-
-FcChar8 *
-FcConfigHome (void)
-{
-    return NULL;
-}
-
 int
 main (void)
 {