diff --git a/ext/Makefile.in b/ext/Makefile.in
index 1eaa52e1b..2e3d8fb71 100755
--- a/ext/Makefile.in
+++ b/ext/Makefile.in
@@ -10,16 +10,19 @@
 BUILD_LAPACK=@build_lapack@
 BUILD_BLAS=@build_blas@
 BUILD_WITH_F2C=@build_with_f2c@
+BUILD_F2C_LIB=@build_f2c_lib@
 USE_SUNDIALS=@use_sundials@
 
 LIBS = blas/libctblas.a lapack/libctlapack.a math/libctmath.a \
        cvode/libcvode.a tpx/libtpx.a
  
 all: 
-ifeq ($(BUILD_WITH_F2C),1)
+ifeq ($(BUILD_F2C_LIB),1)
 	(if test -d "f2c_libs" ; then  \
             cd f2c_libs ; @MAKE@ ; \
          fi)
+endif
+ifeq ($(BUILD_WITH_F2C),1)
 ifeq ($(BUILD_LAPACK),1)
 	cd f2c_lapack; @MAKE@
 else