diff --git a/source/core/gamefuncs.h b/source/core/gamefuncs.h
index 0edd989b9..aededa76a 100644
--- a/source/core/gamefuncs.h
+++ b/source/core/gamefuncs.h
@@ -239,6 +239,18 @@ inline int getangle(const vec2_t& vec)
 }
 
 
+//---------------------------------------------------------------------------
+//
+// Returns an angle delta for Build angles.
+//
+//---------------------------------------------------------------------------
+
+inline constexpr int getincangle(int a, int na)
+{
+	return int(unsigned(na << 21) - unsigned(a << 21)) >> 21;
+}
+
+
 extern int cameradist, cameraclock;
 
 void loaddefinitionsfile(const char* fn, bool cumulative = false, bool maingrp = false);
diff --git a/source/core/gameinput.h b/source/core/gameinput.h
index f1e7c0b76..46bc75dca 100644
--- a/source/core/gameinput.h
+++ b/source/core/gameinput.h
@@ -7,11 +7,6 @@
 #include "gamestruct.h"
 #include "packet.h"
 
-inline constexpr int getincangle(int a, int na)
-{
-	return int(unsigned(na << 21) - unsigned(a << 21)) >> 21;
-}
-
 struct PlayerHorizon
 {
 	fixedhoriz horiz, ohoriz, horizoff, ohorizoff;