diff --git a/tools/bin/td b/tools/bin/td
index 43cd83d..03559df 100644
--- a/tools/bin/td
+++ b/tools/bin/td
@@ -26,7 +26,7 @@
 : "${INCLUDES:=-Isrc/include}"
 
 : "${CC:=cc}"
-: "${CFLAGS:=-Wall -Wextra -pedantic -std=c89 -O3}"
+: "${CFLAGS:=-Wall -Wextra -pedantic -ansi -O3}"
 : "${LDFLAGS:=-lm -pthread -static -flto -fdata-sections -ffunction-sections -s -Wl,-static -Wl,-gc-sections}"
 : "${PROG:=telodendria}"