diff --git a/common/place.cc b/common/place.cc
index 8f174478..17b31c69 100644
--- a/common/place.cc
+++ b/common/place.cc
@@ -41,13 +41,13 @@ void place_design(Design *design)
     // Initial constraints placer
     for (auto cell_entry : design->cells) {
         CellInfo *cell = cell_entry.second;
-        auto loc = cell->attrs.find("LOC");
+        auto loc = cell->attrs.find("BEL");
         if (loc != cell->attrs.end()) {
             std::string loc_name = loc->second;
             BelId bel = design->chip.getBelByName(IdString(loc_name));
             if (bel == BelId()) {
                 log_error("No Bel named \'%s\' located for "
-                          "this chip (processing LOC on \'%s\')\n",
+                          "this chip (processing BEL attribute on \'%s\')\n",
                           loc_name.c_str(), cell->name.c_str());
             }
 
@@ -112,7 +112,7 @@ void place_design(Design *design)
             design->chip.bindBel(cell->bel, cell->name);
 
             // Back annotate location
-            cell->attrs["LOC"] = design->chip.getBelName(cell->bel);
+            cell->attrs["BEL"] = design->chip.getBelName(cell->bel);
         }
     }
 }
diff --git a/ice40/blinky.v b/ice40/blinky.v
index 80f92b06..7fd3a0cf 100644
--- a/ice40/blinky.v
+++ b/ice40/blinky.v
@@ -7,8 +7,8 @@ module blinky (
 	output led5_pin
 );
 	wire clk, led1, led2, led3, led4, led5;
-	
-	(* LOC="0_3_lc0" *)	
+
+	(* BEL="13_12_io1" *)
 	SB_IO #(
 		.PIN_TYPE(6'b 0110_01),
 		.PULLUP(1'b0),
@@ -25,8 +25,8 @@ module blinky (
 		.D_IN_0(),
 		.D_IN_1()
 	);
-	
-	(* LOC="0_3_lc1" *)	
+
+	(* BEL="13_12_io0" *)
 	SB_IO #(
 		.PIN_TYPE(6'b 0110_01),
 		.PULLUP(1'b0),
@@ -44,7 +44,7 @@ module blinky (
 		.D_IN_1()
 	);
 
-	(* LOC="5_17_lc1" *)	
+	(* BEL="13_11_io1" *)
 	SB_IO #(
 		.PIN_TYPE(6'b 0110_01),
 		.PULLUP(1'b0),
@@ -62,7 +62,7 @@ module blinky (
 		.D_IN_1()
 	);
 
-	(* LOC="10_0_lc1" *)	
+	(* BEL="13_11_io0" *)
 	SB_IO #(
 		.PIN_TYPE(6'b 0110_01),
 		.PULLUP(1'b0),
@@ -80,7 +80,7 @@ module blinky (
 		.D_IN_1()
 	);
 
-	(* LOC="12_17_lc0" *)	
+	(* BEL="13_9_io1" *)
 	SB_IO #(
 		.PIN_TYPE(6'b 0110_01),
 		.PULLUP(1'b0),
@@ -98,7 +98,7 @@ module blinky (
 		.D_IN_1()
 	);
 
-	(* LOC="0_6_lc0" *)
+	(* BEL="0_8_io1" *)
 	SB_IO #(
 		.PIN_TYPE(6'b 0000_01),
 		.PULLUP(1'b0),
diff --git a/ice40/chipdb.py b/ice40/chipdb.py
index 78ba2e46..b4240e2d 100644
--- a/ice40/chipdb.py
+++ b/ice40/chipdb.py
@@ -186,7 +186,7 @@ def add_bel_lc(x, y, z):
 
 def add_bel_io(x, y, z):
     bel = len(bel_name)
-    bel_name.append("%d_%d_lc%d" % (x, y, z))
+    bel_name.append("%d_%d_io%d" % (x, y, z))
     bel_type.append("SB_IO")
     bel_pos.append((x, y, z))
     bel_wires.append(list())