diff --git a/c++/carla-backend/carla_native.cpp b/c++/carla-backend/carla_native.cpp
index c8bad2e..a2bd787 100644
--- a/c++/carla-backend/carla_native.cpp
+++ b/c++/carla-backend/carla_native.cpp
@@ -1661,7 +1661,7 @@ CarlaPlugin* CarlaPlugin::newNative(const initializer& init)
 
     if (carlaOptions.processMode == PROCESS_MODE_CONTINUOUS_RACK)
     {
-        if (! plugin->hints() & PLUGIN_CAN_FORCE_STEREO)
+        if (! (plugin->hints() & PLUGIN_CAN_FORCE_STEREO))
         {
             setLastError("Carla's rack mode can only work with Mono or Stereo Internal plugins, sorry!");
             delete plugin;
diff --git a/c++/carla-backend/dssi.cpp b/c++/carla-backend/dssi.cpp
index 640b2b8..90d7d97 100644
--- a/c++/carla-backend/dssi.cpp
+++ b/c++/carla-backend/dssi.cpp
@@ -1558,17 +1558,17 @@ CarlaPlugin* CarlaPlugin::newDSSI(const initializer& init, const void* const ext
 
     plugin->reload();
 
-#ifndef BUILD_BRIDGE
+#  ifndef BUILD_BRIDGE
     if (carlaOptions.processMode == PROCESS_MODE_CONTINUOUS_RACK)
     {
-        if (! plugin->hints() & PLUGIN_CAN_FORCE_STEREO)
+        if (! (plugin->hints() & PLUGIN_CAN_FORCE_STEREO))
         {
             setLastError("Carla's rack mode can only work with Mono or Stereo DSSI plugins, sorry!");
             delete plugin;
             return nullptr;
         }
     }
-#endif
+#  endif
 
     plugin->registerToOscControl();
 
diff --git a/c++/carla-backend/ladspa.cpp b/c++/carla-backend/ladspa.cpp
index a6ebf31..1d182c5 100644
--- a/c++/carla-backend/ladspa.cpp
+++ b/c++/carla-backend/ladspa.cpp
@@ -1163,17 +1163,17 @@ CarlaPlugin* CarlaPlugin::newLADSPA(const initializer& init, const void* const e
 
     plugin->reload();
 
-#ifndef BUILD_BRIDGE
+#  ifndef BUILD_BRIDGE
     if (carlaOptions.processMode == PROCESS_MODE_CONTINUOUS_RACK)
     {
-        if (! plugin->hints() & PLUGIN_CAN_FORCE_STEREO)
+        if (! (plugin->hints() & PLUGIN_CAN_FORCE_STEREO))
         {
             setLastError("Carla's rack mode can only work with Mono or Stereo LADSPA plugins, sorry!");
             delete plugin;
             return nullptr;
         }
     }
-#endif
+#  endif
 
     plugin->registerToOscControl();
 
diff --git a/c++/carla-backend/lv2.cpp b/c++/carla-backend/lv2.cpp
index 1c64808..e514e2c 100644
--- a/c++/carla-backend/lv2.cpp
+++ b/c++/carla-backend/lv2.cpp
@@ -4510,17 +4510,17 @@ CarlaPlugin* CarlaPlugin::newLV2(const initializer& init)
 
     plugin->reload();
 
-#ifndef BUILD_BRIDGE
+#  ifndef BUILD_BRIDGE
     if (carlaOptions.processMode == PROCESS_MODE_CONTINUOUS_RACK)
     {
-        if (! plugin->hints() & PLUGIN_CAN_FORCE_STEREO)
+        if (! (plugin->hints() & PLUGIN_CAN_FORCE_STEREO))
         {
             setLastError("Carla's rack mode can only work with Mono (simple) or Stereo LV2 plugins, sorry!");
             delete plugin;
             return nullptr;
         }
     }
-#endif
+#  endif
 
     plugin->registerToOscControl();
     plugin->updateUi();
diff --git a/c++/carla-backend/vst.cpp b/c++/carla-backend/vst.cpp
index c0c1172..0e6d863 100644
--- a/c++/carla-backend/vst.cpp
+++ b/c++/carla-backend/vst.cpp
@@ -2308,17 +2308,17 @@ CarlaPlugin* CarlaPlugin::newVST(const initializer& init)
 
     plugin->reload();
 
-#ifndef BUILD_BRIDGE
+#  ifndef BUILD_BRIDGE
     if (carlaOptions.processMode == PROCESS_MODE_CONTINUOUS_RACK)
     {
-        if (! plugin->hints() & PLUGIN_CAN_FORCE_STEREO)
+        if (! (plugin->hints() & PLUGIN_CAN_FORCE_STEREO))
         {
             setLastError("Carla's rack mode can only work with Stereo VST plugins, sorry!");
             delete plugin;
             return nullptr;
         }
     }
-#endif
+#  endif
 
     plugin->registerToOscControl();