diff --git a/Makefile b/Makefile
index 54601dfc..8a990eb7 100644
--- a/Makefile
+++ b/Makefile
@@ -92,10 +92,10 @@ radioafsk: libax5043.a
 radioafsk: afsk/ax25.o
 radioafsk: afsk/ax5043.o
 radioafsk: afsk/main.o
-	gcc $(DEBUG_BEHAVIOR) -o radioafsk -pedantic -Wall -Wextra -L./ afsk/ax25.o afsk/ax5043.o afsk/main.o -lwiringPi -lax5043 -lcurl
+	gcc -std=gnu99 $(DEBUG_BEHAVIOR) -o radioafsk -pedantic -Wall -Wextra -L./ afsk/ax25.o afsk/ax5043.o afsk/main.o -lwiringPi -lax5043 -lcurl
 
 telem: afsk/telem.o
-	gcc $(DEBUG_BEHAVIOR) -o telem -pedantic -Wall -Wextra -L./ afsk/telem.o -lwiringPi 
+	gcc -std=gnu99 $(DEBUG_BEHAVIOR) -o telem -pedantic -Wall -Wextra -L./ afsk/telem.o -lwiringPi 
 
 ax5043/generated/configcommon.o: ax5043/generated/configcommon.c
 ax5043/generated/configcommon.o: ax5043/generated/configrx.h