diff --git a/Makefile b/Makefile
index 3c9cc73..28965ad 100644
--- a/Makefile
+++ b/Makefile
@@ -219,7 +219,7 @@ libpd := dep/lib/libpd.a
 SOURCES += src/LibPDEngine.cpp
 OBJECTS += $(libpd)
 DEPS += $(libpd)
-FLAGS += -Idep/include/libpd
+FLAGS += -Idep/include/libpd -DHAVE_LIBDL
 
 ifdef ARCH_WIN
 	# the PD_INTERNAL leaves the function declarations for libpd unchanged