diff --git a/defconv.h b/defconv.h
index 070a46be..06b2efd5 100644
--- a/defconv.h
+++ b/defconv.h
@@ -1,7 +1,5 @@
 // Common calling convention macro for some functions that originated in TH02
 // as __cdecl, but were then changed to __pascal in TH03.
-#pragma once
-
 #ifndef GAME
 # error GAME not defined
 #elif GAME >= 3
diff --git a/th03/math/subpixel.hpp b/th03/math/subpixel.hpp
index 88c17322..8971d9bc 100644
--- a/th03/math/subpixel.hpp
+++ b/th03/math/subpixel.hpp
@@ -1,8 +1,6 @@
 // Fixed-point format for expressing world-space coordinates, with 4 bits of
 // fractional resolution.
 
-#pragma once
-
 typedef int subpixel_t;
 
 inline subpixel_t to_sp(float screen_v) {