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-rw-r--r--tools/CoqMakefile.in2
1 files changed, 1 insertions, 1 deletions
diff --git a/tools/CoqMakefile.in b/tools/CoqMakefile.in
index 4f967e6336..3027bf92d2 100644
--- a/tools/CoqMakefile.in
+++ b/tools/CoqMakefile.in
@@ -150,7 +150,7 @@ else
CAMLP4EXTEND=
endif
-PP:=-pp '$(CAMLP4O) -I $(CAMLLIB) -I $(COQLIB)/grammar compat5.cmo $(CAMLP4EXTEND) $(GRAMMARS) $(CAMLP4OPTIONS) -impl'
+PP:=-pp '$(CAMLP4O) -I $(CAMLLIB) -I "$(COQLIB)/grammar" compat5.cmo $(CAMLP4EXTEND) $(GRAMMARS) $(CAMLP4OPTIONS) -impl'
COQLIBINSTALL = $(COQLIB)user-contrib
COQDOCINSTALL = $(DOCDIR)user-contrib