diff --git a/src/main/java/plugins/stef/roi/quantify/PathIntensityProfiler.java b/src/main/java/plugins/stef/roi/quantify/PathIntensityProfiler.java
index 8e07b2170eadd19dc21604ab5d2d54d4d992398a..5ba01d353eee178e4fbb1cc0389d421c68df069f 100644
--- a/src/main/java/plugins/stef/roi/quantify/PathIntensityProfiler.java
+++ b/src/main/java/plugins/stef/roi/quantify/PathIntensityProfiler.java
@@ -224,8 +224,8 @@ public class PathIntensityProfiler extends EzPlug implements Block, EzStoppable
         for (ROI roi : rois)
         {
             // create a sheet for each ROI
-            final IcySpreadSheet sh = new IcySpreadSheet(
-                    result.createSheet(roi.getName() + String.format(" - S%04d", Integer.valueOf(roiIndex))));
+            final IcySpreadSheet sh = new IcySpreadSheet(result.createSheet(
+                    roi.getName().replace(':', '_') + String.format(" - S%04d", Integer.valueOf(roiIndex))));
 
             // write columns headers
             int indCol = 0;