diff --git a/libavfilter/vf_lut.c b/libavfilter/vf_lut.c
index e262c6e5ac..935bb08533 100644
--- a/libavfilter/vf_lut.c
+++ b/libavfilter/vf_lut.c
@@ -162,7 +162,7 @@ static double compute_gammaval(void *opaque, double gamma)
 }
 
 /**
- * Compute Rec.709 gama correction of value val
+ * Compute ITU Rec.709 gamma correction of value val.
  */
 static double compute_gammaval709(void *opaque, double gamma)
 {