diff --git a/makefile b/makefile
index e4d81ef..4a28373 100644
--- a/makefile
+++ b/makefile
@@ -25,7 +25,7 @@ else
     DPP_PATH          = ../DPP
 	DPP_BUILD_DIR      = $(DPP_PATH)/build/library
 	LIB_PATHS          = $(DPP_BUILD_DIR)
-	INC_DIRS = -Iinclude -I../DPP/include/
+	INC_DIRS = -Iinclude -I$(DPP_PATH)/include/
 endif
 
 DPP_VERSION       := $(or $(DPP_VERSION),10.1.4)# Fallback version if auto-detection fails