diff --git a/libavfilter/tinterlace.h b/libavfilter/tinterlace.h
index 5bcb9a583a..e204b61aa0 100644
--- a/libavfilter/tinterlace.h
+++ b/libavfilter/tinterlace.h
@@ -37,6 +37,12 @@
 #define TINTERLACE_FLAG_CVLPF 2
 #define TINTERLACE_FLAG_EXACT_TB 4
 
+enum VLPFilter {
+    VLPF_OFF = 0,
+    VLPF_LIN = 1,
+    VLPF_CMP = 2,
+};
+
 enum TInterlaceMode {
     MODE_MERGE = 0,
     MODE_DROP_EVEN,
@@ -59,6 +65,7 @@ typedef struct TInterlaceContext {
     int mode;                   ///< TInterlaceMode, interlace mode selected
     AVRational preout_time_base;
     int flags;                  ///< flags affecting interlacing algorithm
+    int lowpass;                ///< legacy interlace filter lowpass mode
     int frame;                  ///< number of the output frame
     int vsub;                   ///< chroma vertical subsampling
     AVFrame *cur;
diff --git a/libavfilter/vf_tinterlace.c b/libavfilter/vf_tinterlace.c
index fc5d11e053..32b2ff9f5a 100644
--- a/libavfilter/vf_tinterlace.c
+++ b/libavfilter/vf_tinterlace.c
@@ -63,10 +63,10 @@ static const AVOption interlace_options[] = {
    { "scan",              "scanning mode", OFFSET(mode), AV_OPT_TYPE_INT, {.i64 = MODE_TFF}, 0, 1, FLAGS, "mode"},
    { "tff",               "top field first",                              0, AV_OPT_TYPE_CONST, {.i64 = MODE_TFF}, INT_MIN, INT_MAX, FLAGS, .unit = "mode"},
    { "bff",               "bottom field first",                           0, AV_OPT_TYPE_CONST, {.i64 = MODE_BFF}, INT_MIN, INT_MAX, FLAGS, .unit = "mode"},
-   { "lowpass",           "set vertical low-pass filter", OFFSET(flags), AV_OPT_TYPE_FLAGS,   {.i64 = TINTERLACE_FLAG_VLPF}, 0, 2, FLAGS, "flags" },
-   { "off",               "disable vertical low-pass filter",             0, AV_OPT_TYPE_CONST, {.i64 = 0}, INT_MIN, INT_MAX, FLAGS, "flags" },
-   { "linear",            "linear vertical low-pass filter",              0, AV_OPT_TYPE_CONST, {.i64 = TINTERLACE_FLAG_VLPF}, INT_MIN, INT_MAX, FLAGS, "flags" },
-   { "complex",           "complex vertical low-pass filter",             0, AV_OPT_TYPE_CONST, {.i64 = TINTERLACE_FLAG_CVLPF},INT_MIN, INT_MAX, FLAGS, "flags" },
+   { "lowpass",           "set vertical low-pass filter", OFFSET(lowpass), AV_OPT_TYPE_INT,   {.i64 = VLPF_LIN}, 0, 2, FLAGS, "lowpass" },
+   {     "off",           "disable vertical low-pass filter",             0, AV_OPT_TYPE_CONST, {.i64 = VLPF_OFF}, INT_MIN, INT_MAX, FLAGS, "lowpass" },
+   {     "linear",        "linear vertical low-pass filter",              0, AV_OPT_TYPE_CONST, {.i64 = VLPF_LIN}, INT_MIN, INT_MAX, FLAGS, "lowpass" },
+   {     "complex",       "complex vertical low-pass filter",             0, AV_OPT_TYPE_CONST, {.i64 = VLPF_CMP}, INT_MIN, INT_MAX, FLAGS, "lowpass" },
 
    { NULL }
 };
@@ -518,6 +518,11 @@ static int init_interlace(AVFilterContext *ctx)
     if (tinterlace->mode <= MODE_BFF)
         tinterlace->mode += MODE_INTERLEAVE_TOP;
 
+    if (tinterlace->lowpass == VLPF_LIN)
+        tinterlace->flags |= TINTERLACE_FLAG_VLPF;
+    if (tinterlace->lowpass == VLPF_CMP)
+        tinterlace->flags |= TINTERLACE_FLAG_CVLPF;
+
     return 0;
 }