diff --git a/dlls/d3dcompiler_43/Makefile.in b/dlls/d3dcompiler_43/Makefile.in
index c31aa6c2a62..40f80150105 100644
--- a/dlls/d3dcompiler_43/Makefile.in
+++ b/dlls/d3dcompiler_43/Makefile.in
@@ -1,6 +1,7 @@
 MODULE    = d3dcompiler_43.dll
 IMPORTS   = dxguid uuid
 EXTRALIBS = -lwpp
+EXTRADEFS = -DD3D_COMPILER_VERSION=43
 
 C_SRCS = \
 	asmparser.c \