diff --git a/libavfilter/pthread.c b/libavfilter/pthread.c
index 1c5419340d..37ca73f9ff 100644
--- a/libavfilter/pthread.c
+++ b/libavfilter/pthread.c
@@ -40,7 +40,7 @@ typedef struct ThreadContext {
     pthread_t *workers;
     avfilter_action_func *func;
 
-    /* per-execute perameters */
+    /* per-execute parameters */
     AVFilterContext *ctx;
     void *arg;
     int   *rets;