diff --git a/di-edid-decode.c b/di-edid-decode.c
index 4fb0808..7f25668 100644
--- a/di-edid-decode.c
+++ b/di-edid-decode.c
@@ -277,7 +277,11 @@ print_detailed_timing_def(const struct di_edid_detailed_timing_def *def)
 	hbl = def->horiz_blank - 2 * def->horiz_border;
 	vbl = def->vert_blank - 2 * def->vert_border;
 	horiz_total = def->horiz_video + hbl;
-	vert_total = def->vert_video + vbl;
+	if (def->interlaced)
+		vert_total = def->vert_video / 2 + def->vert_blank +
+			def->vert_sync_pulse + 0.5;
+	else
+		vert_total = def->vert_video + vbl;
 	refresh = (double) def->pixel_clock_hz / (horiz_total * vert_total);
 	horiz_freq_hz = (double) def->pixel_clock_hz / horiz_total;
 
diff --git a/edid.c b/edid.c
index af55f02..a7d783b 100644
--- a/edid.c
+++ b/edid.c
@@ -403,6 +403,9 @@ _di_edid_parse_detailed_timing_def(const uint8_t data[static EDID_BYTE_DESCRIPTO
 	flags = data[17];
 
 	def->interlaced = has_bit(flags, 7);
+	if (def->interlaced) {
+		def->vert_video *= 2;
+	}
 
 	stereo_hi = get_bit_range(flags, 6, 5);
 	stereo_lo = get_bit_range(flags, 0, 0);
diff --git a/test/data/goldstar-ite6604-hdmi.diff b/test/data/goldstar-ite6604-hdmi.diff
index a35a7ce..e15ddcd 100644
--- a/test/data/goldstar-ite6604-hdmi.diff
+++ b/test/data/goldstar-ite6604-hdmi.diff
@@ -84,7 +84,7 @@
                   Hfront   88 Hsync  44 Hback  148 Hpol P
                   Vfront    4 Vsync   5 Vback   36 Vpol P
 -    DTD 6:  1920x1080i  60.000000 Hz  16:9     33.750 kHz     74.250000 MHz (708 mm x 398 mm)
-+    DTD 6:  1920x540  i  60.053381 Hz  32:9     33.750 kHz     74.250000 MHz (708 mm x 398 mm)
++    DTD 6:  1920x1080 i  60.053381 Hz  16:9     33.750 kHz     74.250000 MHz (708 mm x 398 mm)
                   Hfront   88 Hsync  44 Hback  148 Hpol P
 -                 Vfront    2 Vsync   5 Vback   15 Vpol P Vfront +0.5 Odd Field
 -                 Vfront    2 Vsync   5 Vback   15 Vpol P Vback  +0.5 Even Field
diff --git a/test/data/viewsonic-vp2768-dp.diff b/test/data/viewsonic-vp2768-dp.diff
index a953cbb..f700129 100644
--- a/test/data/viewsonic-vp2768-dp.diff
+++ b/test/data/viewsonic-vp2768-dp.diff
@@ -58,7 +58,7 @@
                   Hfront   88 Hsync  44 Hback  148 Hpol P
                   Vfront    4 Vsync   5 Vback   36 Vpol P
 -    DTD 3:  1920x1080i  60.000000 Hz  16:9     33.750 kHz     74.250000 MHz (597 mm x 336 mm)
-+    DTD 3:  1920x540  i  60.053381 Hz  32:9     33.750 kHz     74.250000 MHz (597 mm x 336 mm)
++    DTD 3:  1920x1080 i  60.053381 Hz  16:9     33.750 kHz     74.250000 MHz (597 mm x 336 mm)
                   Hfront   88 Hsync  44 Hback  148 Hpol P
 -                 Vfront    2 Vsync   5 Vback   15 Vpol P Vfront +0.5 Odd Field
 -                 Vfront    2 Vsync   5 Vback   15 Vpol P Vback  +0.5 Even Field