diff --git a/build/tools/sctools/files/taddevs/Makefile b/build/tools/sctools/files/taddevs/Makefile
index a039213..0581055 100644
--- a/build/tools/sctools/files/taddevs/Makefile
+++ b/build/tools/sctools/files/taddevs/Makefile
@@ -1,9 +1,11 @@
 RM = rm.exe -f
 
+TADFILES=$(wildcard *.tad)
+
 TAD_TABLE_FILE = taddev_table.txt
 TAD_MAKE_INC_FILE = ../../copy_dst/MakefileTadDev.inc
 
-$(TAD_TABLE_FILE): *.tad
+$(TAD_TABLE_FILE):  $(TADFILES)
 		../../bin/make_tad_table.exe -dir . -o $@ -var MAKEROM_TADDEV_ROMFILES -fdir taddevs -mk $(TAD_MAKE_INC_FILE)
 
 
diff --git a/build/tools/sctools/files/tads/Makefile b/build/tools/sctools/files/tads/Makefile
index b475ae2..a8e37a0 100644
--- a/build/tools/sctools/files/tads/Makefile
+++ b/build/tools/sctools/files/tads/Makefile
@@ -1,9 +1,11 @@
 RM = rm.exe -f
 
+TADFILES=$(wildcard *.tad)
+
 TAD_TABLE_FILE = tad_table.txt
 TAD_MAKE_INC_FILE = ../../copy_dst/MakefileTad.inc
 
-$(TAD_TABLE_FILE): *.tad
+$(TAD_TABLE_FILE): $(TADFILES)
 		../../bin/make_tad_table.exe -dir . -o $@ -var MAKEROM_TAD_ROMFILES -fdir tads -mk $(TAD_MAKE_INC_FILE)