diff --git a/Makefile b/Makefile
index ee1fc139..29a4ee9e 100644
--- a/Makefile
+++ b/Makefile
@@ -62,6 +62,10 @@ DEBUG_LDFLAGS :=
 ABSTOPDIR = $(shell pwd)
 TOPDIR := .
 
+# Disable certain GCC 8 + glibc 2.28 warning for snprintf()
+# where string truncation for snprintf() is expected.
+DISABLE_WARNING_FLAGS := $(call cc-disable-warning, format-truncation)
+
 # Common build flags
 CFLAGS = $(SUBST_CFLAGS) \
 	 $(CSTD) \
@@ -73,6 +77,7 @@ CFLAGS = $(SUBST_CFLAGS) \
 	 -I$(TOPDIR) \
 	 -I$(TOPDIR)/kernel-lib \
 	 -I$(TOPDIR)/libbtrfsutil \
+	 $(DISABLE_WARNING_FLAGS) \
 	 $(EXTRAWARN_CFLAGS) \
 	 $(DEBUG_CFLAGS_INTERNAL) \
 	 $(EXTRA_CFLAGS)
diff --git a/Makefile.extrawarn b/Makefile.extrawarn
index 9c88950e..e084ac61 100644
--- a/Makefile.extrawarn
+++ b/Makefile.extrawarn
@@ -52,6 +52,7 @@ warning-1 += -Wold-style-definition
 warning-1 += $(call cc-option, -Wmissing-include-dirs)
 warning-1 += $(call cc-option, -Wunused-but-set-variable)
 warning-1 += $(call cc-disable-warning, missing-field-initializers)
+warning-1 += $(call cc-disable-warning, format-truncation)
 
 warning-2 := -Waggregate-return
 warning-2 += -Wcast-align
@@ -60,6 +61,7 @@ warning-2 += -Wnested-externs
 warning-2 += -Wshadow
 warning-2 += $(call cc-option, -Wlogical-op)
 warning-2 += $(call cc-option, -Wmissing-field-initializers)
+warning-2 += $(call cc-option, -Wformat-truncation)
 
 warning-3 := -Wbad-function-cast
 warning-3 += -Wcast-qual