diff --git a/src/pisa/sbase/Makefile.am b/src/pisa/sbase/Makefile.am
index 053e83a..4ff3394 100755
--- a/src/pisa/sbase/Makefile.am
+++ b/src/pisa/sbase/Makefile.am
@@ -1,4 +1,4 @@
-pkgdatadir = $(datadir)/sbase
+pkgdatadir = $(datadir)/pisa/sbase
 dist_pkgdata_DATA = \
 graph.sbase     index.sbase     struct.sbase
 
diff --git a/src/pisa/sbase/Makefile.in b/src/pisa/sbase/Makefile.in
index faa3f7f..8630bd7 100755
--- a/src/pisa/sbase/Makefile.in
+++ b/src/pisa/sbase/Makefile.in
@@ -62,7 +62,7 @@ POST_UNINSTALL = :
 EXEEXT = @EXEEXT@
 OBJEXT = @OBJEXT@
 PATH_SEPARATOR = @PATH_SEPARATOR@
-pkgdatadir = $(datadir)/sbase
+pkgdatadir = $(datadir)/pisa/sbase
 AMTAR = @AMTAR@
 AR_FLAGS = @AR_FLAGS@
 AWK = @AWK@