diff --git a/src/ifcparse/IfcSIPrefix.cpp b/src/ifcparse/IfcSIPrefix.cpp
index 7d6be88017..b37b08dec1 100644
--- a/src/ifcparse/IfcSIPrefix.cpp
+++ b/src/ifcparse/IfcSIPrefix.cpp
@@ -73,16 +73,16 @@ double IfcParse::get_SI_equivalent(typename Schema::IfcNamedUnit* named_unit) {
 	return scale;
 }
 
-#if _MSC_VER >= 1900
-template double IfcParse::get_SI_equivalent<Ifc2x3>(typename Ifc2x3::IfcNamedUnit* named_unit);
-template double IfcParse::get_SI_equivalent<Ifc4>(typename Ifc4::IfcNamedUnit* named_unit);
-template double IfcParse::get_SI_equivalent<Ifc4x1>(typename Ifc4x1::IfcNamedUnit* named_unit);
-template double IfcParse::get_SI_equivalent<Ifc4x2>(typename Ifc4x2::IfcNamedUnit* named_unit);
-template double IfcParse::get_SI_equivalent<Ifc4x3_rc1>(typename Ifc4x3_rc1::IfcNamedUnit* named_unit);
-#else
+#if defined(_MSC_VER) && _MSC_VER < 1900
 template double IfcParse::get_SI_equivalent<Ifc2x3>(Ifc2x3::IfcNamedUnit* named_unit);
 template double IfcParse::get_SI_equivalent<Ifc4>(Ifc4::IfcNamedUnit* named_unit);
 template double IfcParse::get_SI_equivalent<Ifc4x1>(Ifc4x1::IfcNamedUnit* named_unit);
 template double IfcParse::get_SI_equivalent<Ifc4x2>(Ifc4x2::IfcNamedUnit* named_unit);
 template double IfcParse::get_SI_equivalent<Ifc4x3_rc1>(Ifc4x3_rc1::IfcNamedUnit* named_unit);
+#else
+template double IfcParse::get_SI_equivalent<Ifc2x3>(typename Ifc2x3::IfcNamedUnit* named_unit);
+template double IfcParse::get_SI_equivalent<Ifc4>(typename Ifc4::IfcNamedUnit* named_unit);
+template double IfcParse::get_SI_equivalent<Ifc4x1>(typename Ifc4x1::IfcNamedUnit* named_unit);
+template double IfcParse::get_SI_equivalent<Ifc4x2>(typename Ifc4x2::IfcNamedUnit* named_unit);
+template double IfcParse::get_SI_equivalent<Ifc4x3_rc1>(typename Ifc4x3_rc1::IfcNamedUnit* named_unit);
 #endif