diff --git a/src/driver/Makefile.am b/src/driver/Makefile.am
index 72a1c19bf..9675eb14a 100644
--- a/src/driver/Makefile.am
+++ b/src/driver/Makefile.am
@@ -1,4 +1,5 @@
 AM_CXXFLAGS = -fno-rtti -fno-exceptions -D__STDC_FORMAT_MACROS -D__STDC_LIMIT_MACROS
+AM_CPPFLAGS = -D_FILE_OFFSET_BITS=64
 
 SUBDIRS = pictureviewer audiodec
 
@@ -6,7 +7,7 @@ if ENABLE_GRAPHLCD
 SUBDIRS += glcd
 endif
 
-AM_CPPFLAGS = \
+AM_CPPFLAGS += \
 	-I$(top_builddir) \
 	-I$(top_srcdir) \
 	-I$(top_srcdir)/src \
diff --git a/src/gui/Makefile.am b/src/gui/Makefile.am
index 4f2071964..c1590b7e5 100644
--- a/src/gui/Makefile.am
+++ b/src/gui/Makefile.am
@@ -1,4 +1,4 @@
-AM_CPPFLAGS = -fno-rtti -D__STDC_FORMAT_MACROS -D__STDC_LIMIT_MACROS
+AM_CPPFLAGS = -fno-rtti -D__STDC_FORMAT_MACROS -D__STDC_LIMIT_MACROS -D_FILE_OFFSET_BITS=64
 
 VERSION_H = version.h
 $(VERSION_H):