diff --git a/arduino-mk/Arduino.mk b/arduino-mk/Arduino.mk
index 69f1eca..465f46c 100644
--- a/arduino-mk/Arduino.mk
+++ b/arduino-mk/Arduino.mk
@@ -669,6 +669,8 @@ ifndef ARDUINO_LIBS
         $(shell sed -ne "s/^ *\# *include *[<\"]\(.*\)\.h[>\"]/\1/p" $(LOCAL_SRCS)))
     ARDUINO_LIBS += $(filter $(notdir $(wildcard $(ARDUINO_SKETCHBOOK)/libraries/*)), \
         $(shell sed -ne "s/^ *\# *include *[<\"]\(.*\)\.h[>\"]/\1/p" $(LOCAL_SRCS)))
+    ARDUINO_LIBS += $(filter $(notdir $(wildcard $(USER_LIB_PATH)/*)), \
+        $(shell sed -ne "s/^ *\# *include *[<\"]\(.*\)\.h[>\"]/\1/p" $(LOCAL_SRCS)))
 endif
 
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