diff --git a/src/main/java/gov/usgs/earthquake/nshmp/gmm/SubductionZone.java b/src/main/java/gov/usgs/earthquake/nshmp/gmm/SubductionZone.java
index 589782a8a6327abc08ad51263108cde9dc31e582..46dc5e46b7e43868ba443220970e1d49304ea83c 100644
--- a/src/main/java/gov/usgs/earthquake/nshmp/gmm/SubductionZone.java
+++ b/src/main/java/gov/usgs/earthquake/nshmp/gmm/SubductionZone.java
@@ -16,7 +16,9 @@ enum SubductionZone {
 
   @Override
   public String toString() {
-    return Text.enumLabelWithSpaces(this, true);
+    return (this == PRVI)
+        ? name()
+        : Text.enumLabelWithSpaces(this, true);
   }
 
   static enum Type {