diff --git a/src/main/java/gov/usgs/earthquake/nshmp/calc/HazardExport.java b/src/main/java/gov/usgs/earthquake/nshmp/calc/HazardExport.java
index 35f95b04b91cc4afe43a1caff2c8cbfdf137de07..1e1e7b639f6a7a0f81e49ed8680c66b8e6619395 100644
--- a/src/main/java/gov/usgs/earthquake/nshmp/calc/HazardExport.java
+++ b/src/main/java/gov/usgs/earthquake/nshmp/calc/HazardExport.java
@@ -258,7 +258,7 @@ public final class HazardExport {
 
   private static String magsFilename(Site site) {
     String baseName = String.format(
-        "%.2f,%.2f.csv",
+        "%s,%s.csv",
         site.location().longitude,
         site.location().latitude);
     return site.name().equals(Site.NO_NAME)