diff --git a/mad.c b/mad.c
index ddc0a2e..09647a7 100644
--- a/mad.c
+++ b/mad.c
@@ -808,7 +808,7 @@ unsigned long prng(unsigned long state)
 * NAME:        audio_linear_dither()
 * DESCRIPTION: generic linear sample quantize and dither routine
 */
-inline
+static inline
 signed long audio_linear_dither(unsigned int bits, mad_fixed_t sample,
                                 struct audio_dither *dither)
 {