diff --git a/dix/dixutils.c b/dix/dixutils.c
index d1edc11c6..28f017fc2 100644
--- a/dix/dixutils.c
+++ b/dix/dixutils.c
@@ -96,8 +96,6 @@ Author:  Adobe Systems Incorporated
 #include "pixmapstr.h"
 #include "gcstruct.h"
 #include "scrnintstr.h"
-#define  XK_LATIN1
-#include <X11/keysymdef.h>
 #include "xace.h"
 
 /*
@@ -144,47 +142,6 @@ ClientTimeToServerTime(CARD32 c)
     return ts;
 }
 
-/*
- * ISO Latin-1 case conversion routine
- *
- * this routine always null-terminates the result, so
- * beware of too-small buffers
- */
-
-static unsigned char
-ISOLatin1ToLower(unsigned char source)
-{
-    unsigned char dest;
-
-    if ((source >= XK_A) && (source <= XK_Z))
-        dest = source + (XK_a - XK_A);
-    else if ((source >= XK_Agrave) && (source <= XK_Odiaeresis))
-        dest = source + (XK_agrave - XK_Agrave);
-    else if ((source >= XK_Ooblique) && (source <= XK_Thorn))
-        dest = source + (XK_oslash - XK_Ooblique);
-    else
-        dest = source;
-    return dest;
-}
-
-int
-CompareISOLatin1Lowered(const unsigned char *s1, int s1len,
-                        const unsigned char *s2, int s2len)
-{
-    unsigned char c1, c2;
-
-    for (;;) {
-        /* note -- compare against zero so that -1 ignores len */
-        c1 = s1len-- ? *s1++ : '\0';
-        c2 = s2len-- ? *s2++ : '\0';
-        if (!c1 ||
-            (c1 != c2 &&
-             (c1 = ISOLatin1ToLower(c1)) != (c2 = ISOLatin1ToLower(c2))))
-            break;
-    }
-    return (int) c1 - (int) c2;
-}
-
 /*
  * dixLookupWindow and dixLookupDrawable:
  * Look up the window/drawable taking into account the client doing the
diff --git a/include/dix.h b/include/dix.h
index 8f0336d4c..8a7ecd345 100644
--- a/include/dix.h
+++ b/include/dix.h
@@ -185,11 +185,6 @@ extern _X_HIDDEN Bool CreateConnectionBlock(void);
 
 /* dixutils.c */
 
-extern _X_EXPORT int CompareISOLatin1Lowered(const unsigned char * /*a */ ,
-                                             int alen,
-                                             const unsigned char * /*b */ ,
-                                             int blen);
-
 extern _X_EXPORT int dixLookupWindow(WindowPtr *result,
                                      XID id,
                                      ClientPtr client, Mask access_mode);
diff --git a/render/filter.c b/render/filter.c
index 2741f406c..44f6b6465 100644
--- a/render/filter.c
+++ b/render/filter.c
@@ -24,6 +24,9 @@
 #include <dix-config.h>
 #endif
 
+#define  XK_LATIN1
+#include <X11/keysymdef.h>
+
 #include "misc.h"
 #include "scrnintstr.h"
 #include "os.h"
@@ -42,6 +45,47 @@
 static char **filterNames;
 static int nfilterNames;
 
+/*
+ * ISO Latin-1 case conversion routine
+ *
+ * this routine always null-terminates the result, so
+ * beware of too-small buffers
+ */
+
+static unsigned char
+ISOLatin1ToLower(unsigned char source)
+{
+    unsigned char dest;
+
+    if ((source >= XK_A) && (source <= XK_Z))
+        dest = source + (XK_a - XK_A);
+    else if ((source >= XK_Agrave) && (source <= XK_Odiaeresis))
+        dest = source + (XK_agrave - XK_Agrave);
+    else if ((source >= XK_Ooblique) && (source <= XK_Thorn))
+        dest = source + (XK_oslash - XK_Ooblique);
+    else
+        dest = source;
+    return dest;
+}
+
+static int
+CompareISOLatin1Lowered(const unsigned char *s1, int s1len,
+                        const unsigned char *s2, int s2len)
+{
+    unsigned char c1, c2;
+
+    for (;;) {
+        /* note -- compare against zero so that -1 ignores len */
+        c1 = s1len-- ? *s1++ : '\0';
+        c2 = s2len-- ? *s2++ : '\0';
+        if (!c1 ||
+            (c1 != c2 &&
+             (c1 = ISOLatin1ToLower(c1)) != (c2 = ISOLatin1ToLower(c2))))
+            break;
+    }
+    return (int) c1 - (int) c2;
+}
+
 /*
  * standard but not required filters don't have constant indices
  */