diff --git a/GCKit/GNUmakefile b/GCKit/GNUmakefile
index cb55379..8361369 100644
--- a/GCKit/GNUmakefile
+++ b/GCKit/GNUmakefile
@@ -22,7 +22,7 @@ GCKit_HEADER_FILES = \
 
 GCKit_LIBRARIES_DEPEND_UPON += -lpthread
 
-GCKit_OBJCFLAGS += -Werror -std=c99 -march=native -fno-inline
+GCKit_OBJCFLAGS += -Werror -std=c99 -fno-inline
 
 include $(GNUSTEP_MAKEFILES)/library.make
 include $(GNUSTEP_MAKEFILES)/tool.make
diff --git a/GNUmakefile b/GNUmakefile
index ea3da8c..2e5ccce 100644
--- a/GNUmakefile
+++ b/GNUmakefile
@@ -62,7 +62,7 @@ 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 += -std=c99 -g -march=native -fexceptions -fno-inline
+libobjc_CFLAGS += -std=c99 -g -fexceptions -fno-inline
 libobjc_OBJCFLAGS += $(libobjc_CFLAGS)
 libobjc_LDFLAGS += -g
 libobjc_LIB_DIRS += -L toydispatch/obj
diff --git a/toydispatch/GNUmakefile b/toydispatch/GNUmakefile
index 916fba9..2f5fcc4 100644
--- a/toydispatch/GNUmakefile
+++ b/toydispatch/GNUmakefile
@@ -13,6 +13,6 @@ toydispatch_HEADER_FILES = \
 
 toydispatch_LIBRARIES_DEPEND_UPON += -lpthread
 
-toydispatch_CFLAGS += -Werror -std=c99 -march=native
+toydispatch_CFLAGS += -Werror -std=c99
 
 include $(GNUSTEP_MAKEFILES)/library.make