diff --git a/Makefile.in b/Makefile.in
index 2aaa6ca59..362b4e0a3 100644
--- a/Makefile.in
+++ b/Makefile.in
@@ -28,7 +28,7 @@ CPPFLAGS      = @CPPFLAGS@ -D_GNU_SOURCE
 CXXFLAGS_ORIG := $(CXXFLAGS)
 CXXFLAGS      = @CXXFLAGS@ $(COMMON_FLAGS) -D_GNU_SOURCE
 MKDIR_P       = $(COND_SILENCE)mkdir -p
-CUDA_FLAGS    = @CUDA_FLAGS@ @CUDA_COMPUTE_ARGS@
+CUDA_FLAGS    = @CUDA_FLAGS@ @CUDA_COMPUTE_ARGS@ @DEFS@
 LDFLAGS      =  @LDFLAGS@
 LIBS         += @LIBS@ @MATHLIBS@ -lm -pthread
 INC           = -Isrc -I$(srcdir)/src -I$(srcdir)/test \