diff --git a/config.mk b/config.mk
index 46e956f6d33408e94ab6684afca0542864fd5b65..f65d3ca48d280c0ca5717e408a9ccc783adb4cb7 100644
--- a/config.mk
+++ b/config.mk
@@ -169,7 +169,9 @@ CFLAGS := $(CPPFLAGS) -Wall -Wno-trigraphs
 endif
 endif
 
-AFLAGS_DEBUG := -Wa,-g
+# $(CPPFLAGS) sets -g, which causes gcc to pass a suitable -g<format>
+# option to the assembler.
+AFLAGS_DEBUG :=
 
 # turn jbsr into jsr for m68k
 ifeq ($(ARCH),m68k)