diff --git a/src/utils/BamTools/Makefile b/src/utils/BamTools/Makefile
index aac8c3e360ff881caf9fb255576e079f0eaeea5e..8c2247c2a4203af6bdb3dbcca1be44ecdbf467ef 100644
--- a/src/utils/BamTools/Makefile
+++ b/src/utils/BamTools/Makefile
@@ -39,12 +39,11 @@ OBJECTS= $(SOURCES:.cpp=.o)
 LIBRARY=libbamtools.a
 
 all: $(LIBRARY)
-
+    
 .PHONY: all
 
-[ -d lib ] || mkdir -p lib
-
 $(LIBRARY): $(OBJECTS)
+	[ -d lib ] || mkdir -p lib
 	@echo "  * linking $(LIBRARY)"
 	ar cr lib/$@  $^