diff --git a/source/build/include/build.h b/source/build/include/build.h
index d199df82a..f99fc8517 100644
--- a/source/build/include/build.h
+++ b/source/build/include/build.h
@@ -1612,7 +1612,6 @@ extern int32_t(*saveboard_replace)(const char *filename, const vec3_t *dapos, in
 extern void(*PolymostProcessVoxels_Callback)(void);
 #endif
 
-extern int32_t automapping;
 extern int32_t bloodhack;
 extern intptr_t voxoff[MAXVOXELS][MAXVOXMIPS]; // used in KenBuild
 extern int8_t voxreserve[(MAXVOXELS+7)>>3];