diff --git a/configs/xtrs/nsh/Make.defs b/configs/xtrs/nsh/Make.defs
index 1c582dffb2..f73855d2a3 100644
--- a/configs/xtrs/nsh/Make.defs
+++ b/configs/xtrs/nsh/Make.defs
@@ -65,7 +65,7 @@ SDCCLIB			= z80.lib
 ASMEXT			= .asm
 OBJEXT			= .o
 LIBEXT			= .lib
-EXEEXT			= .CMD
+EXEEXT			= .cmd
 
 define COMPILE
 	@echo "CC: $1"
diff --git a/configs/xtrs/ostest/Make.defs b/configs/xtrs/ostest/Make.defs
index 47de3f0ee8..561fce02ee 100644
--- a/configs/xtrs/ostest/Make.defs
+++ b/configs/xtrs/ostest/Make.defs
@@ -65,7 +65,7 @@ SDCCLIB			= z80.lib
 ASMEXT			= .asm
 OBJEXT			= .o
 LIBEXT			= .lib
-EXEEXT			= .CMD
+EXEEXT			= .cmd
 
 define COMPILE
 	@echo "CC: $1"
diff --git a/configs/xtrs/pashello/Make.defs b/configs/xtrs/pashello/Make.defs
index 47de3f0ee8..561fce02ee 100644
--- a/configs/xtrs/pashello/Make.defs
+++ b/configs/xtrs/pashello/Make.defs
@@ -65,7 +65,7 @@ SDCCLIB			= z80.lib
 ASMEXT			= .asm
 OBJEXT			= .o
 LIBEXT			= .lib
-EXEEXT			= .CMD
+EXEEXT			= .cmd
 
 define COMPILE
 	@echo "CC: $1"