Index: trunk/styles/standard/elemstyles.mapcss
===================================================================
--- trunk/styles/standard/elemstyles.mapcss	(revision 7996)
+++ trunk/styles/standard/elemstyles.mapcss	(revision 7997)
@@ -1168,7 +1168,11 @@
 node[generator:source=tidal],
 node[generator:source=wave],
-node[generator:source=osmotic],
+node[generator:source=osmotic] {
+    icon-image: "presets/power_source-water.svg";
+    set icon_z17;
+    text: auto;
+}
 node[generator:source=geothermal] {
-    icon-image: "presets/power_source-water.svg";
+    icon-image: "presets/power_source-geothermal.svg";
     set icon_z17;
     text: auto;