diff --git a/externals/Makefile b/externals/Makefile
index 4aa265918555dd9929ea4aa75420e8f2bc2eebdd..d9d40b227a2e206f55d8694e3441503faa7033a2 100644
--- a/externals/Makefile
+++ b/externals/Makefile
@@ -1343,6 +1343,7 @@ motex_clean:
 # MRPEACH
 MRPEACH_NAME=mrpeach
 MRPEACH_OBJECTS := $(wildcard $(externals_src)/mrpeach/*/*.c)
+mrpeach: WARN_FLAGS=-Wno-pedantic-ms-format
 mrpeach: $(MRPEACH_OBJECTS:.c=.$(EXTENSION))
 
 mrpeach_install: mrpeach