diff --git a/Makefile b/Makefile
index fd8edc5963..edbdbe39d3 100644
--- a/Makefile
+++ b/Makefile
@@ -182,7 +182,6 @@ REG_TEST_SCRIPT=./scripts/run-regtests.sh
 # to be sure we get the intended behavior.
 SPEC_CFLAGS := -fno-strict-aliasing -Wdeclaration-after-statement
 SPEC_CFLAGS += $(call cc-opt-alt,-fwrapv,$(call cc-opt,-fno-strict-overflow))
-SPEC_CFLAGS += $(call cc-nowarn,format-truncation)
 SPEC_CFLAGS += $(call cc-nowarn,address-of-packed-member)
 SPEC_CFLAGS += $(call cc-nowarn,unused-label)
 SPEC_CFLAGS += $(call cc-nowarn,sign-compare)