diff --git a/cpu/6502/Makefile.6502 b/cpu/6502/Makefile.6502
index 9308335ea..e7f3f56a6 100644
--- a/cpu/6502/Makefile.6502
+++ b/cpu/6502/Makefile.6502
@@ -35,8 +35,6 @@ ifndef CC65_HOME
   ${error CC65_HOME not defined! You must specify where cc65 resides}
 endif
 
-all: cs8900a.eth lan91c96.eth w5100.eth
-
 .SUFFIXES:
 
 CONTIKI_TARGET_DIRS = . lib sys
@@ -58,6 +56,8 @@ MODULES += core/ctk core/net/ip core/net/ipv4 core/net/ipv6
 # Set target-specific variable values
 ${addprefix $(OBJECTDIR)/,${call oname, $(ETHERNET_SOURCEFILES)}}: ASFLAGS += -D DYN_DRV=0
 
+all: $(ETHERNET_SOURCEFILES:.S=.eth)
+
 AS = ca65
 CC = cl65
 LD = ld65