diff --git a/lang/smlnj/patches/patch-src_runtime_objs_makefile b/lang/smlnj/patches/patch-src_runtime_objs_makefile
new file mode 100644
index 00000000000..24a73f13104
--- /dev/null
+++ b/lang/smlnj/patches/patch-src_runtime_objs_makefile
@@ -0,0 +1,12 @@
+$OpenBSD: patch-src_runtime_objs_makefile,v 1.1 2010/05/22 10:17:36 espie Exp $
+--- src/runtime/objs/makefile.orig	Sat May 22 12:03:11 2010
++++ src/runtime/objs/makefile	Sat May 22 12:06:12 2010
+@@ -260,7 +260,7 @@ prim.o:		$(MACH_DIR)/$(TARGET).prim.asm \
+ 		ml-sizes.h reg-mask.h $(INC_DIR)/ml-base.h $(INC_DIR)/tags.h \
+ 		$(INC_DIR)/asm-base.h \
+ 		mlstate-offsets.h
+-	$(CPP) -D_ASM_ $(DEFS) -I$(BC_DIR) $(INCLUDES) $(MACH_DIR)/$(TARGET).prim.asm > prim.s
++	$(CPP) -D_ASM_ -fno-dollars-in-identifiers $(DEFS) -I$(BC_DIR) $(INCLUDES) $(MACH_DIR)/$(TARGET).prim.asm > prim.s
+ 	$(AS) -o prim.o prim.s
+ 
+ $(MACH_DIR)/BYTECODE.prim.asm: bc-instr-def.h $(BC_DIR)/bc-instrs.h $(BC_DIR)/bc.h