diff --git a/emulator/firmware-decomp/emu_main.py b/emulator/firmware-decomp/emu_main.py
index e8cf56a..007ee90 100644
--- a/emulator/firmware-decomp/emu_main.py
+++ b/emulator/firmware-decomp/emu_main.py
@@ -111,9 +111,10 @@ class MainRunner:
         self.heap = [0x08010000, 0x0c010000]   # bump allocator over the DRAM banks
 
     def h_igcwait(self, cpu):
-        # Post-flush drain wait: the firmware polls [r16] until the IGC clears
-        # it after consuming the region queue. We are the IGC: consume instantly.
-        cpu.mem.w32(cpu.rd(16), 0)
+        # Post-flush drain wait: the firmware polls [page] until the IGC writes a
+        # NONZERO completion status after consuming it (loop at 0xf0421504: exits
+        # the per-page wait when [r16] != 0). We are the IGC: complete instantly.
+        cpu.mem.w32(cpu.rd(16), 1)
         cpu.step()
         return True