diff --git a/Makefile b/Makefile
index b82900a..1516c81 100644
--- a/Makefile
+++ b/Makefile
@@ -5,7 +5,7 @@
 # published by Sam Hocevar. See the COPYING file for more details.
 
 CFLAGS = -g -Wall -Wextra -Werror -std=c99
-CFLAGS += -D_POSIX_C_SOURCE=199309L -D_BSD_SOURCE -D_DARWIN_C_SOURCE
+CFLAGS += -D_POSIX_C_SOURCE=199309L -D_BSD_SOURCE -D_DEFAULT_SOURCE -D_DARWIN_C_SOURCE
 LDLIBS = -lcheck
 
 all: scan-build test example
diff --git a/minmea.c b/minmea.c
index 5566d95..e5633c6 100644
--- a/minmea.c
+++ b/minmea.c
@@ -12,6 +12,7 @@
 #include <string.h>
 #include <ctype.h>
 #include <stdarg.h>
+#include <time.h>
 
 #define boolstr(s) ((s) ? "true" : "false")