diff --git a/contrib/sIPOPT/AmplSolver/Makefile.am b/contrib/sIPOPT/AmplSolver/Makefile.am
index 0ef0ef551..b056387b8 100644
--- a/contrib/sIPOPT/AmplSolver/Makefile.am
+++ b/contrib/sIPOPT/AmplSolver/Makefile.am
@@ -7,7 +7,8 @@ bin_PROGRAMS = ipopt_sens
 ipopt_sens_SOURCES = ampl_sipopt.cpp SensAmplTNLP.cpp
 
 ipopt_sens_LDADD = ../src/libsipopt.la \
-  ../../../src/Apps/AmplSolver/libipoptamplinterface.la
+  ../../../src/Apps/AmplSolver/libipoptamplinterface.la \
+  $(SIPOPTAMPLINTERFACELIB_LFLAGS)
 
 AM_LDFLAGS = $(LT_LDFLAGS)
 
diff --git a/contrib/sIPOPT/AmplSolver/Makefile.in b/contrib/sIPOPT/AmplSolver/Makefile.in
index 9076d7e25..087b809cb 100644
--- a/contrib/sIPOPT/AmplSolver/Makefile.in
+++ b/contrib/sIPOPT/AmplSolver/Makefile.in
@@ -109,7 +109,8 @@ PROGRAMS = $(bin_PROGRAMS)
 am_ipopt_sens_OBJECTS = ampl_sipopt.$(OBJEXT) SensAmplTNLP.$(OBJEXT)
 ipopt_sens_OBJECTS = $(am_ipopt_sens_OBJECTS)
 ipopt_sens_DEPENDENCIES = ../src/libsipopt.la \
-	../../../src/Apps/AmplSolver/libipoptamplinterface.la
+	../../../src/Apps/AmplSolver/libipoptamplinterface.la \
+	$(am__DEPENDENCIES_1)
 AM_V_lt = $(am__v_lt_@AM_V@)
 am__v_lt_ = $(am__v_lt_@AM_DEFAULT_V@)
 am__v_lt_0 = --silent
@@ -347,7 +348,8 @@ top_builddir = @top_builddir@
 top_srcdir = @top_srcdir@
 ipopt_sens_SOURCES = ampl_sipopt.cpp SensAmplTNLP.cpp
 ipopt_sens_LDADD = ../src/libsipopt.la \
-  ../../../src/Apps/AmplSolver/libipoptamplinterface.la
+  ../../../src/Apps/AmplSolver/libipoptamplinterface.la \
+  $(SIPOPTAMPLINTERFACELIB_LFLAGS)
 
 AM_LDFLAGS = $(LT_LDFLAGS)
 AM_CPPFLAGS = \