diff --git a/asm/include/main.inc b/asm/include/main.inc
index 28481a5c..9ace1882 100644
--- a/asm/include/main.inc
+++ b/asm/include/main.inc
@@ -1111,3 +1111,4 @@
 .extern data_027e0d28
 .extern data_027e0d18
 .extern func_ov16_0211ffdc
+.extern gHeap
diff --git a/asm/main.s b/asm/main.s
index d4599e95..ce720fde 100644
--- a/asm/main.s
+++ b/asm/main.s
@@ -19951,7 +19951,7 @@ _0200e57c:
 	pop {r3, pc}
 	.align 2, 0
 	thumb_func_end func_0200e52c
-_0200e580: .word 0x0219b1c0
+_0200e580: .word gHeap
 _0200e584: .word data_0205acdc
 _0200e588: .word 0x023e0000
 _0200e58c: .word 0x01ffffa0
@@ -63993,7 +63993,7 @@ _0202f738: .word data_020577dc
 _0202f73c: .word data_020577ec
 _0202f740: .word data_020577f0
 _0202f744: .word data_027e02a0
-_0202f748: .word 0x0219b1c0
+_0202f748: .word gHeap
 _0202f74c: .word func_01ff8000
 _0202f750: .word data_020577f8
 
diff --git a/tools/lcf.py b/tools/lcf.py
index b2ec479b..538c8085 100644
--- a/tools/lcf.py
+++ b/tools/lcf.py
@@ -264,10 +264,15 @@ with open(f'{BUILD}arm9_linker_script.lcf', 'w') as file:
             file.write(f'AFTER({str(ov.after)})')
 
         file.write(f' > overlays/{ov.name}.bin\n')
+    file.write('\n')
+    file.write('    HEAP : ORIGIN = AFTER(ARM9,')
+    file.write(','.join(map(str, OVERLAYS)))
+    file.write(')\n')
     file.write('}\n')
     file.write('\n')
     file.write('SECTIONS {\n')
     file.write('    .arm9 : {\n')
+    file.write('        gHeap = ADDR(HEAP);\n')
     file.write('        . = ALIGN(32);\n')
     for obj in ARM9_OBJECTS: file.write(f'        {name(obj)}.o(.text)\n')
     for obj in ARM9_OBJECTS: file.write(f'        {name(obj)}.o(.init)\n')
@@ -373,6 +378,10 @@ with open(f'{BUILD}arm9_linker_script.lcf', 'w') as file:
         file.write('WRITEW 0; ') # compression flags, overlay is compressed later
         file.write('\n')
     file.write('    } > OV_TABLE\n')
+    file.write('\n')
+    file.write('    .heap : {\n')
+    file.write('        gHeap = .;\n')
+    file.write('    } > HEAP\n')
     file.write('}\n')
 
 with open(f'{BUILD}arm9_objects.txt', 'w') as file: