diff --git a/Makefile b/Makefile
index 1841eb6b8..c9a7c2e05 100644
--- a/Makefile
+++ b/Makefile
@@ -38,7 +38,7 @@ ASFLAGS := -mcpu=arm7tdmi
 CC1             := tools/agbcc/bin/agbcc$(EXE)
 override CFLAGS += -mthumb-interwork -Wimplicit -Wparentheses -Werror -O2 -fhex-asm
 
-CPPFLAGS := -I tools/agbcc/include -I tools/agbcc -iquote include
+CPPFLAGS := -I tools/agbcc/include -I tools/agbcc -iquote include -Wno-trigraphs
 
 LDFLAGS = -Map ../../$(MAP)