diff --git a/extras/Projucer/Source/ProjectSaving/jucer_ProjectExporter.cpp b/extras/Projucer/Source/ProjectSaving/jucer_ProjectExporter.cpp
index 0d7822319f..544073a06d 100644
--- a/extras/Projucer/Source/ProjectSaving/jucer_ProjectExporter.cpp
+++ b/extras/Projucer/Source/ProjectSaving/jucer_ProjectExporter.cpp
@@ -414,7 +414,7 @@ StringPairArray ProjectExporter::getAllPreprocessorDefs (const BuildConfiguratio
     addTargetSpecificPreprocessorDefs (defs, targetType);
 
     if (! project.shouldUseAppConfig())
-        defs = mergePreprocessorDefs (defs, project.getAppConfigDefs());
+        defs = mergePreprocessorDefs (project.getAppConfigDefs(), defs);
 
     return defs;
 }