diff --git a/Bootloaders/makefile b/Bootloaders/makefile
index 56db658088..0c183e73ec 100644
--- a/Bootloaders/makefile
+++ b/Bootloaders/makefile
@@ -13,7 +13,7 @@
 # custom LUFA library build options are reflected in the compiled
 # code.
 
-PROJECT_DIRECTORIES = $(shell ls -d *)
+PROJECT_DIRECTORIES = $(shell ls -d */)
 
 # This makefile is potentially infinitely recursive if something really bad
 # happens when determining the set of project directories - hard-abort if
diff --git a/Demos/Device/LowLevel/makefile b/Demos/Device/LowLevel/makefile
index 639b253032..99e7c24a15 100644
--- a/Demos/Device/LowLevel/makefile
+++ b/Demos/Device/LowLevel/makefile
@@ -13,7 +13,7 @@
 # custom LUFA library build options are reflected in the compiled
 # code.
 
-PROJECT_DIRECTORIES = $(shell ls -d *)
+PROJECT_DIRECTORIES = $(shell ls -d */)
 
 # This makefile is potentially infinitely recursive if something really bad
 # happens when determining the set of project directories - hard-abort if
diff --git a/Demos/DualRole/ClassDriver/makefile b/Demos/DualRole/ClassDriver/makefile
index ecc49ec895..a6ccbf1c34 100644
--- a/Demos/DualRole/ClassDriver/makefile
+++ b/Demos/DualRole/ClassDriver/makefile
@@ -13,7 +13,7 @@
 # custom LUFA library build options are reflected in the compiled
 # code.
 
-PROJECT_DIRECTORIES = $(shell ls -d *)
+PROJECT_DIRECTORIES = $(shell ls -d */)
 
 # This makefile is potentially infinitely recursive if something really bad
 # happens when determining the set of project directories - hard-abort if
diff --git a/Demos/Host/ClassDriver/makefile b/Demos/Host/ClassDriver/makefile
index 25cfedf1a5..776fa18dc7 100644
--- a/Demos/Host/ClassDriver/makefile
+++ b/Demos/Host/ClassDriver/makefile
@@ -13,7 +13,7 @@
 # custom LUFA library build options are reflected in the compiled
 # code.
 
-PROJECT_DIRECTORIES = $(shell ls -d *)
+PROJECT_DIRECTORIES = $(shell ls -d */)
 
 # This makefile is potentially infinitely recursive if something really bad
 # happens when determining the set of project directories - hard-abort if
diff --git a/Demos/Host/LowLevel/makefile b/Demos/Host/LowLevel/makefile
index 25cfedf1a5..776fa18dc7 100644
--- a/Demos/Host/LowLevel/makefile
+++ b/Demos/Host/LowLevel/makefile
@@ -13,7 +13,7 @@
 # custom LUFA library build options are reflected in the compiled
 # code.
 
-PROJECT_DIRECTORIES = $(shell ls -d *)
+PROJECT_DIRECTORIES = $(shell ls -d */)
 
 # This makefile is potentially infinitely recursive if something really bad
 # happens when determining the set of project directories - hard-abort if
diff --git a/Projects/makefile b/Projects/makefile
index 94deb0ed31..5c30bc9812 100644
--- a/Projects/makefile
+++ b/Projects/makefile
@@ -13,7 +13,7 @@
 # custom LUFA library build options are reflected in the compiled
 # code.
 
-PROJECT_DIRECTORIES = $(shell ls -d *)
+PROJECT_DIRECTORIES = $(shell ls -d */)
 
 # This makefile is potentially infinitely recursive if something really bad
 # happens when determining the set of project directories - hard-abort if