diff --git a/libavfilter/hermite.h b/libavfilter/hermite.h
index 6142391b2ec9af8792ad039246128be1fa6f220c..5a4645fea9fe3ff301699554c9c25a464e6bdab8 100644
--- a/libavfilter/hermite.h
+++ b/libavfilter/hermite.h
@@ -16,7 +16,7 @@
  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  */
 
-inline double hermite_interpolation(double x, double x0, double x1,
+static inline double hermite_interpolation(double x, double x0, double x1,
                                     double p0, double p1,
                                     double m0, double m1)
 {