--- libsrc/Makefile
+++ libsrc/Makefile
@@ -254,10 +254,10 @@
 
 $(foreach drvtype,$(DRVTYPES),$(eval $(call DRVTYPE_template,$(drvtype))))
 
-AR65 := $(if $(wildcard ../bin/ar65*),../bin/ar65,ar65)
-CA65 := $(if $(wildcard ../bin/ca65*),../bin/ca65,ca65)
-CC65 := $(if $(wildcard ../bin/cc65*),../bin/cc65,cc65)
-LD65 := $(if $(wildcard ../bin/ld65*),../bin/ld65,ld65)
+AR65 := $(if $(wildcard ../bin/ar65*),../bin/ar65,ar65)$(EXE_SUFFIX)
+CA65 := $(if $(wildcard ../bin/ca65*),../bin/ca65,ca65)$(EXE_SUFFIX)
+CC65 := $(if $(wildcard ../bin/cc65*),../bin/cc65,cc65)$(EXE_SUFFIX)
+LD65 := $(if $(wildcard ../bin/ld65*),../bin/ld65,ld65)$(EXE_SUFFIX)
 
 export CC65_HOME := $(abspath ..)