diff --git a/GNUmakefile b/GNUmakefile
index 7f384e5..154348b 100644
--- a/GNUmakefile
+++ b/GNUmakefile
@@ -62,8 +62,8 @@ libobjc_CPPFLAGS += -D__OBJC_RUNTIME_INTERNAL__=1 -D_XOPEN_SOURCE=500
 # Note to Riccardo.  Please do not 'fix' C99isms in this.  The new ABI is only
 # useful on compilers that support C99 (currently only clang), so there is no
 # benefit from supporting platforms with no C99 compiler.
-libobjc_CFLAGS += -Werror -std=c99 -g -fexceptions -O0 -fno-inline
-libobjc_OBJCFLAGS += -g -std=c99 -O0 -fno-inline
+libobjc_CFLAGS += -Werror -std=c99 -g -fexceptions
+libobjc_OBJCFLAGS += -g -std=c99
 libobjc_LDFLAGS += -g
 
 ifeq ($(findstring no, $(debug)),)