--- a/tests/Makefile.am
+++ b/tests/Makefile.am
@@ -14,5 +14,5 @@ check_PROGRAMS  = $(TESTS)
 
 # Ignore warnings about unused result, in e.g. write()
 CFLAGS          = -W -Wall -Wextra -Wno-unused-result -Wno-unused-parameter
-CPPFLAGS        = -D_GNU_SOURCE
+CPPFLAGS        = -D_GNU_SOURCE -D_TIME_BITS=64 -D_FILE_OFFSET_BITS=64
 LDADD           = -L../src ../src/libuev.la