diff --git a/lib/ofdm_decode_mac.cc b/lib/ofdm_decode_mac.cc
index d9b3790..8f2a21a 100644
--- a/lib/ofdm_decode_mac.cc
+++ b/lib/ofdm_decode_mac.cc
@@ -78,7 +78,7 @@ int general_work (int noutput_items, gr_vector_int& ninput_items,
 
 	while(i < ninput_items[0]) {
 
-		get_tags_in_range(tags, 0, nread + i * 48, nread + (i + 1) * 48 - 1,
+		get_tags_in_range(tags, 0, nread + i, nread + i + 1,
 			pmt::string_to_symbol("ofdm_start"));
 
 		if(tags.size()) {
diff --git a/lib/ofdm_decode_signal.cc b/lib/ofdm_decode_signal.cc
index f4b15b2..b0e2e1c 100644
--- a/lib/ofdm_decode_signal.cc
+++ b/lib/ofdm_decode_signal.cc
@@ -60,7 +60,7 @@ int general_work (int noutput_items, gr_vector_int& ninput_items,
 
 	while((i < ninput_items[0]) && (o < noutput_items)) {
 
-		get_tags_in_range(tags, 0, nread + i * 48, nread + (i + 1) * 48 - 1,
+		get_tags_in_range(tags, 0, nread + i, nread + i + 1,
 			pmt::string_to_symbol("ofdm_start"));
 
 		if(tags.size()) {
diff --git a/lib/ofdm_equalize_symbols.cc b/lib/ofdm_equalize_symbols.cc
index d0db549..335d3bc 100644
--- a/lib/ofdm_equalize_symbols.cc
+++ b/lib/ofdm_equalize_symbols.cc
@@ -53,7 +53,7 @@ int general_work (int noutput_items, gr_vector_int& ninput_items,
 
 	while((i < ninput_items[0]) && (i < noutput)) {
 
-		get_tags_in_range(tags, 0, nread + i * 64, nread + (i + 1) * 64 - 1,
+		get_tags_in_range(tags, 0, nread + i, nread + i + 1,
 			pmt::string_to_symbol("ofdm_start"));
 
 		if(tags.size()) {