diff --git a/src/pc/gfx/gfx_pc.c b/src/pc/gfx/gfx_pc.c
index 150552485..d673dbd02 100644
--- a/src/pc/gfx/gfx_pc.c
+++ b/src/pc/gfx/gfx_pc.c
@@ -104,8 +104,8 @@ Color gFogColor = { 0xFF, 0xFF, 0xFF };
 f32 gFogIntensity = 1;
 
 // need inverse camera matrix to compute world space for lighting engine
-Mat4 sInverseCameraMatrix;
-bool sHasInverseCameraMatrix = false;
+static Mat4 sInverseCameraMatrix;
+static bool sHasInverseCameraMatrix = false;
 
 // 4x4 pink-black checkerboard texture to indicate missing textures
 #define MISSING_W 4
diff --git a/src/pc/gfx/gfx_pc.h b/src/pc/gfx/gfx_pc.h
index 3b3344cb4..ba16bcd4e 100644
--- a/src/pc/gfx/gfx_pc.h
+++ b/src/pc/gfx/gfx_pc.h
@@ -39,9 +39,6 @@ extern Color gVertexColor;
 extern Color gFogColor;
 extern f32 gFogIntensity;
 
-extern Mat4 sInverseCameraMatrix;
-extern bool sHasInverseCameraMatrix;
-
 #ifdef __cplusplus
 extern "C" {
 #endif