diff --git a/asymptote/Makefile.in b/asymptote/Makefile.in
index bf93e2a..ee87c53 100644
--- a/asymptote/Makefile.in
+++ b/asymptote/Makefile.in
@@ -9,7 +9,7 @@ GCLIB = @GCLIB@
 GCPPLIB = @GCPPLIB@
 GCLIBS = $(GCPPLIB) $(GCLIB)
 LFLAGS = @LDFLAGS@
-LIBS = $(LFLAGS) @LIBS@ $(GCLIBS)
+LIBS = $(LFLAGS) @LIBS@ $(GCLIBS) -lGL
 
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