diff --git a/source/discovery/Makefile b/source/discovery/Makefile
index 89523a7d6..dbe80b2fe 100644
--- a/source/discovery/Makefile
+++ b/source/discovery/Makefile
@@ -14,6 +14,11 @@ BUILD_CXX_FLAGS += -I../includes/ladspa -I../includes/vst -I../includes/vst3
 
 ifeq ($(MACOS),true)
 BUILD_CXX_FLAGS += -ObjC++
+WANT_JUCE_PROCESSORS = true
+endif
+
+ifeq ($(WIN32),true)
+WANT_JUCE_PROCESSORS = true
 endif
 
 BUILD_CXX_FLAGS += $(QTCORE_FLAGS)
@@ -69,6 +74,10 @@ LIBS_win64   += ../modules/juce_core.win64.a
 LINK_FLAGS   += $(JUCE_CORE_LIBS) $(JUCE_AUDIO_BASICS_LIBS)
 endif
 
+ifeq ($(WANT_JUCE_PROCESSORS),true)
+LIBS         += ../modules/juce_audio_processors.a
+endif
+
 POSIX_BUILD_FLAGS = $(BUILD_CXX_FLAGS)
 POSIX_32BIT_FLAGS = $(32BIT_FLAGS) -L/usr/lib32 -L/usr/lib/i386-linux-gnu
 POSIX_64BIT_FLAGS = $(64BIT_FLAGS) -L/usr/lib64 -L/usr/lib/x86_64-linux-gnu
diff --git a/source/modules/juce_audio_processors/Makefile b/source/modules/juce_audio_processors/Makefile
index 7bfdd568f..f5629bffa 100644
--- a/source/modules/juce_audio_processors/Makefile
+++ b/source/modules/juce_audio_processors/Makefile
@@ -13,6 +13,13 @@ LINK_FLAGS      += $(JUCE_AUDIO_PROCESSORS_LIBS) -L.. -ljuce_audio_basics -ljuce
 
 ifeq ($(CARLA_VESTIGE_HEADER),true)
 BUILD_CXX_FLAGS += -DVESTIGE_HEADER
+else
+# needed by vst3
+ifeq ($(DEBUG),true)
+BUILD_CXX_FLAGS += -DDEVELOPMENT -D_DEBUG
+else
+BUILD_CXX_FLAGS += -DRELEASE
+endif
 endif
 
 ifeq ($(MACOS),true)
diff --git a/source/utils/CarlaVstUtils.hpp b/source/utils/CarlaVstUtils.hpp
index e885bb860..77b4c183b 100644
--- a/source/utils/CarlaVstUtils.hpp
+++ b/source/utils/CarlaVstUtils.hpp
@@ -127,8 +127,8 @@ struct VstTimeInfo_R {
 # define TARGET_API_MAC_CARBON 0
 #endif
 #undef VST_64BIT_PLATFORM
-#define VST_64BIT_PLATFORM defined(_WIN64) || defined(__LP64__) || defined (_LP64)
-#include "vst/aeffectx.h"
+#define VST_64BIT_PLATFORM (defined(_WIN64) || defined(__LP64__) || defined (_LP64))
+#include "vst/pluginterfaces/vst2.x/aeffectx.h"
 typedef VstTimeInfo VstTimeInfo_R;
 #endif