diff --git a/FL/Xutf8.h b/FL/Xutf8.h
index 1e26cf97d..51fc28291 100644
--- a/FL/Xutf8.h
+++ b/FL/Xutf8.h
@@ -142,6 +142,9 @@ long
 XKeysymToUcs(
 	KeySym 	keysym);
 
+#ifdef X_HAVE_UTF8_STRING
+#define XUtf8LookupString Xutf8LookupString
+#else
 int
 XUtf8LookupString(
     XIC                 ic,
@@ -150,6 +153,7 @@ XUtf8LookupString(
     int                 bytes_buffer,
     KeySym*             keysym,
     Status*             status_return);
+#endif
 
 unsigned short
 XUtf8IsNonSpacing(
diff --git a/src/xutf8/utf8Input.c b/src/xutf8/utf8Input.c
index ee2c229e5..dc7ed3388 100644
--- a/src/xutf8/utf8Input.c
+++ b/src/xutf8/utf8Input.c
@@ -407,6 +407,7 @@ XConvertEucToUtf8(const char*	locale,
   return len;
 }
 
+#ifndef X_HAVE_UTF8_STRING
 int
 XUtf8LookupString(XIC                 ic,
 		  XKeyPressedEvent*   event,
@@ -447,6 +448,7 @@ XUtf8LookupString(XIC                 ic,
   }
   return len;
 }
+#endif /* X11 has utf-8 */
 
 #endif /* X11 only */