diff --git a/extensions/sdktools/Makefile b/extensions/sdktools/Makefile
index a1a872ea..47cec5d7 100644
--- a/extensions/sdktools/Makefile
+++ b/extensions/sdktools/Makefile
@@ -17,7 +17,7 @@ LINK_HL2 = $(HL2LIB)/tier1_i486.a $(HL2LIB)/mathlib_i486.a vstdlib_i486.so tier0
 
 OBJECTS = sdk/smsdk_ext.cpp extension.cpp vdecoder.cpp vcallbuilder.cpp vcaller.cpp \
 	vnatives.cpp vsound.cpp tenatives.cpp trnatives.cpp tempents.cpp vstringtable.cpp \
-	vhelpers.cpp vglobals.cpp voice.cpp
+	vhelpers.cpp vglobals.cpp voice.cpp inputnatives.cpp
 
 ##############################################
 ### CONFIGURE ANY OTHER FLAGS/OPTIONS HERE ###