diff --git a/src/desktoptheme/air/metadata.desktop b/src/desktoptheme/air/metadata.desktop
index a297bb922..c12fde31a 100644
--- a/src/desktoptheme/air/metadata.desktop
+++ b/src/desktoptheme/air/metadata.desktop
@@ -86,6 +86,7 @@ X-KDE-PluginInfo-Category=
 X-KDE-PluginInfo-Depends=
 X-KDE-PluginInfo-License=GPL
 X-KDE-PluginInfo-EnabledByDefault=true
+X-Plasma-API=5.0
 
 [Wallpaper]
 defaultWallpaperTheme=Elarun
diff --git a/src/desktoptheme/breeze-dark/metadata.desktop b/src/desktoptheme/breeze-dark/metadata.desktop
index 9b4d61123..52c0041a5 100644
--- a/src/desktoptheme/breeze-dark/metadata.desktop
+++ b/src/desktoptheme/breeze-dark/metadata.desktop
@@ -41,6 +41,7 @@ X-KDE-PluginInfo-Category=
 X-KDE-PluginInfo-Depends=
 X-KDE-PluginInfo-License=LGPL
 X-KDE-PluginInfo-EnabledByDefault=true
+X-Plasma-API=5.0
 
 [Wallpaper]
 defaultWallpaperTheme=Next
diff --git a/src/desktoptheme/breeze/metadata.desktop b/src/desktoptheme/breeze/metadata.desktop
index ddff6a52d..cb15ee887 100644
--- a/src/desktoptheme/breeze/metadata.desktop
+++ b/src/desktoptheme/breeze/metadata.desktop
@@ -43,6 +43,7 @@ X-KDE-PluginInfo-Category=
 X-KDE-PluginInfo-Depends=
 X-KDE-PluginInfo-License=LGPL
 X-KDE-PluginInfo-EnabledByDefault=true
+X-Plasma-API=5.0
 
 [Wallpaper]
 defaultWallpaperTheme=Next
diff --git a/src/desktoptheme/oxygen/metadata.desktop b/src/desktoptheme/oxygen/metadata.desktop
index a1a0c513f..96592c1bc 100644
--- a/src/desktoptheme/oxygen/metadata.desktop
+++ b/src/desktoptheme/oxygen/metadata.desktop
@@ -82,6 +82,7 @@ X-KDE-PluginInfo-Category=
 X-KDE-PluginInfo-Depends=
 X-KDE-PluginInfo-License=GPL
 X-KDE-PluginInfo-EnabledByDefault=true
+X-Plasma-API=5.0
 
 [Wallpaper]
 defaultWallpaperTheme=Elarun
diff --git a/src/plasma/private/theme_p.cpp b/src/plasma/private/theme_p.cpp
index ccd9f918e..b9c2a555e 100644
--- a/src/plasma/private/theme_p.cpp
+++ b/src/plasma/private/theme_p.cpp
@@ -66,7 +66,10 @@ ThemePrivate::ThemePrivate(QObject *parent)
       useGlobal(true),
       hasWallpapers(false),
       fixedName(false),
-      backgroundContrastEnabled(true)
+      backgroundContrastEnabled(true),
+      apiMajor(1),
+      apiMinor(0),
+      apiRevision(0)
 {
     ThemeConfig config;
     cacheTheme = config.cacheTheme();
@@ -532,6 +535,13 @@ QColor ThemePrivate::color(Theme::ColorRole role, Theme::ColorGroup group) const
 {
     const KColorScheme *scheme = 0;
 
+    //Before 5.0 Plasma theme really only used Normal and Button
+    //many old themes are built on this assumption and will break
+    //otherwise
+    if (apiMajor < 5 && group != Theme::NormalColorGroup) {
+        group = Theme::ButtonColorGroup;
+    }
+
     switch (group) {
     case Theme::ButtonColorGroup: {
         scheme = &buttonColorScheme;
@@ -796,6 +806,26 @@ void ThemePrivate::setThemeName(const QString &tempThemeName, bool writeSettings
             KConfig metadata(metadataPath);
             processWallpaperSettings(&metadata);
         }
+
+        //Check for what Plasma version the theme has been done
+        //There are some behavioral differences between KDE4 Plasma and Plasma 5
+        cg = KConfigGroup(&metadata, "Desktop Entry");
+        const QString apiVersion = cg.readEntry("X-Plasma-API", QString());
+        apiMajor = 1;
+        apiMinor = 0;
+        apiRevision = 0;
+        if (!apiVersion.isEmpty()) {
+            QStringList parts = apiVersion.split('.');
+            if (!parts.isEmpty()) {
+                apiMajor = parts.value(0).toInt();
+            }
+            if (parts.count() > 1) {
+                apiMinor = parts.value(1).toInt();
+            }
+            if (parts.count() > 2) {
+                apiRevision = parts.value(2).toInt();
+            }
+        }
     }
 
     if (realTheme && isDefault && writeSettings) {
diff --git a/src/plasma/private/theme_p.h b/src/plasma/private/theme_p.h
index 309b55502..96e98ed26 100644
--- a/src/plasma/private/theme_p.h
+++ b/src/plasma/private/theme_p.h
@@ -153,6 +153,11 @@ public:
     qreal backgroundIntensity;
     qreal backgroundSaturation;
     bool backgroundContrastEnabled;
+
+    //Version number of Plasma the Theme has been designed for
+    int apiMajor;
+    int apiMinor;
+    int apiRevision;
 };
 
 }