--- a/interfaces/Prolog/Ciao/Makefile.am
+++ b/interfaces/Prolog/Ciao/Makefile.am
@@ -165,7 +165,7 @@ $(NO_UNDEFINED_FLAG) \
 -module \
 -avoid-version
 
-pkglib_DATA = ppl_ciao.po
+pkgdata_DATA = ppl_ciao.po
 
 ppl_ciao.pl: $(interface_generator_dependencies)
 	$(M4) --prefix-builtin -I../.. -I$(srcdir)/.. -I$(srcdir)/../.. \
--- a/interfaces/Prolog/GNU/Makefile.am
+++ b/interfaces/Prolog/GNU/Makefile.am
@@ -164,7 +164,7 @@ ppl_gprolog.pl: $(interface_generator_de
 	$(M4) --prefix-builtin -I../.. -I$(srcdir)/.. -I$(srcdir)/../.. \
            $(srcdir)/ppl_interface_generator_gprolog_pl.m4 > $@
 
-pkglib_DATA = ppl_gprolog.pl
+pkgdata_DATA = ppl_gprolog.pl
 
 bin_PROGRAMS = ppl_gprolog
 
--- a/interfaces/Prolog/SICStus/Makefile.am
+++ b/interfaces/Prolog/SICStus/Makefile.am
@@ -68,7 +68,7 @@ ppl_sicstus_SOURCES =
 
 if ENABLE_SHARED
 
-pkglib_DATA = ppl_sicstus.pl ppl_sicstus.s.o
+pkgdata_DATA = ppl_sicstus.pl ppl_sicstus.s.o
 
 ppl_sicstus.so: ppl_sicstus.pl $(top_builddir)/src/libppl.la $(WATCHDOG_LIBRARY) libppl_sicstus.la
 	$(LIBTOOL) --mode=link --tag=CXX \
@@ -86,7 +86,7 @@ install-data-local: ppl_sicstus.so
 
 else !ENABLE_SHARED
 
-pkglib_DATA = ppl_sicstus.pl
+pkgdata_DATA = ppl_sicstus.pl
 
 endif !ENABLE_SHARED
 
--- a/interfaces/Prolog/SWI/Makefile.am
+++ b/interfaces/Prolog/SWI/Makefile.am
@@ -184,7 +184,7 @@ $(NO_UNDEFINED_FLAG) \
 bin_PROGRAMS = ppl_pl
 ppl_pl_SOURCES = ppl_pl.cc
 
-pkglib_DATA = ppl_swiprolog.pl
+pkgdata_DATA = ppl_swiprolog.pl
 
 CLPQ_TESTS_NONSTRICT = \
 ack.clpq \
--- a/interfaces/Prolog/XSB/Makefile.am
+++ b/interfaces/Prolog/XSB/Makefile.am
@@ -183,7 +183,7 @@ $(NO_UNDEFINED_FLAG) \
 -module \
 -avoid-version
 
-pkglib_DATA = ppl_xsb.xwam
+pkgdata_DATA = ppl_xsb.xwam
 
 ppl_xsb.xwam: ppl_xsb.H ppl_xsb.cc libppl_xsb.la
 	cp -f ppl_xsb.cc ppl_xsb.c
--- a/interfaces/Prolog/YAP/Makefile.am
+++ b/interfaces/Prolog/YAP/Makefile.am
@@ -173,7 +173,7 @@ $(NO_UNDEFINED_FLAG) \
 -module \
 -avoid-version
 
-pkglib_DATA = ppl_yap.pl
+pkgdata_DATA = ppl_yap.pl
 
 CLPQ_TESTS_NONSTRICT = \
 ack.clpq \