3 files changed, 3 insertions, 3 deletions
diff --git a/c/src/exec/itron/include/Makefile.am b/c/src/exec/itron/include/Makefile.am
index 14695128b7..dd02c86c83 100644
--- a/c/src/exec/itron/include/Makefile.am
+++ b/c/src/exec/itron/include/Makefile.am
@@ -6,7 +6,7 @@ AUTOMAKE_OPTIONS = foreign 1.4
 
 include_HEADERS = itron.h
 
-PREINSTALL_FILES += $(PROJECT_INCLUDE) \
+PREINSTALL_FILES = $(PROJECT_INCLUDE) \
     $(include_HEADERS:%=$(PROJECT_INCLUDE)/%)
 
 $(PROJECT_INCLUDE):
diff --git a/c/src/exec/itron/include/itronsys/Makefile.am b/c/src/exec/itron/include/itronsys/Makefile.am
index e0ca56dfaa..c26937d18e 100644
--- a/c/src/exec/itron/include/itronsys/Makefile.am
+++ b/c/src/exec/itron/include/itronsys/Makefile.am
@@ -9,7 +9,7 @@ include_itronsysdir = $(includedir)/itronsys
 include_itronsys_HEADERS = eventflags.h fmempool.h intr.h mbox.h msgbuffer.h network.h port.h \
     semaphore.h status.h sysmgmt.h task.h time.h types.h vmempool.h
 
-PREINSTALL_FILES += $(PROJECT_INCLUDE)/itronsys \
+PREINSTALL_FILES = $(PROJECT_INCLUDE)/itronsys \
     $(include_itronsys_HEADERS:%=$(PROJECT_INCLUDE)/itronsys/%)
 
 $(PROJECT_INCLUDE)/itronsys:
diff --git a/c/src/exec/itron/include/rtems/itron/Makefile.am b/c/src/exec/itron/include/rtems/itron/Makefile.am
index bdd1049a04..d3bb7fc382 100644
--- a/c/src/exec/itron/include/rtems/itron/Makefile.am
+++ b/c/src/exec/itron/include/rtems/itron/Makefile.am
@@ -10,7 +10,7 @@ include_rtems_itron_HEADERS = config.h eventflags.h fmempool.h intr.h itronapi.h
     msgbuffer.h network.h object.h port.h semaphore.h sysmgmt.h task.h \
     time.h vmempool.h
 
-PREINSTALL_FILES += $(PROJECT_INCLUDE)/rtems/itron \
+PREINSTALL_FILES = $(PROJECT_INCLUDE)/rtems/itron \
     $(include_rtems_itron_HEADERS:%=$(PROJECT_INCLUDE)/rtems/itron/%)
 
 $(PROJECT_INCLUDE)/rtems/itron: