diff --git a/makefiles/libc/newlib.mk b/makefiles/libc/newlib.mk
index 7e09a10abc8b..41346ffff62e 100644
--- a/makefiles/libc/newlib.mk
+++ b/makefiles/libc/newlib.mk
@@ -88,11 +88,7 @@ ifeq ($(TOOLCHAIN),llvm)
 endif
 
 ifeq (1,$(USE_NEWLIB_NANO))
-  NEWLIB_NANO_INCLUDE_PATTERNS ?= \
-    $(NEWLIB_INCLUDE_DIR)/newlib-nano \
-    $(NEWLIB_INCLUDE_DIR)/newlib/nano \
-    $(NEWLIB_INCLUDE_DIR)/nano \
-    #
+  NEWLIB_NANO_INCLUDE_PATTERNS ?= $(addprefix $(NEWLIB_INCLUDE_DIR)/, newlib-nano newlib/nano nano)
   NEWLIB_NANO_INCLUDE_DIR ?= $(firstword $(call dir_contains_newlib_h, $(NEWLIB_NANO_INCLUDE_PATTERNS)))
 
   # newlib-nano overrides newlib.h and its include dir should therefore go before