diff --git a/utils/rowgroup/rowgroup.h b/utils/rowgroup/rowgroup.h
index a0055d0c5..fe5952db4 100644
--- a/utils/rowgroup/rowgroup.h
+++ b/utils/rowgroup/rowgroup.h
@@ -756,7 +756,7 @@ inline void Row::setFloatField(float val, uint32_t colIndex)
 	//N.B. There is a bug in boost::any or in gcc where, if you store a nan, you will get back a nan,
 	//  but not necessarily the same bits that you put in. This only seems to be for float (double seems
 	//  to work).
-	if (isnan(val))
+	if (std::isnan(val))
 		setUintField<4>(joblist::FLOATNULL, colIndex);
 	else
 		*((float *) &data[offsets[colIndex]]) = val;