diff --git a/src/bin/exrmetrics/exrmetrics.cpp b/src/bin/exrmetrics/exrmetrics.cpp
index 702875ea2..a31a3f403 100644
--- a/src/bin/exrmetrics/exrmetrics.cpp
+++ b/src/bin/exrmetrics/exrmetrics.cpp
@@ -482,7 +482,7 @@ exrmetrics (
     }
     else { compression = outHeader.compression (); }
 
-    if (!isinf (level) && level >= -1)
+    if (!std::isinf (level) && level >= -1)
     {
         switch (outHeader.compression ())
         {