diff --git a/schemas/iso19115-3.2018/src/main/plugin/iso19115-3.2018/process/onlinesrc-add.xsl b/schemas/iso19115-3.2018/src/main/plugin/iso19115-3.2018/process/onlinesrc-add.xsl
index 61ee24404dd..ccdd293aaa6 100644
--- a/schemas/iso19115-3.2018/src/main/plugin/iso19115-3.2018/process/onlinesrc-add.xsl
+++ b/schemas/iso19115-3.2018/src/main/plugin/iso19115-3.2018/process/onlinesrc-add.xsl
@@ -268,7 +268,7 @@
 
   <xsl:template name="setProtocol">
     <xsl:choose>
-      <xsl:when test="$mimeTypeStrategy = 'mimeType'">
+      <xsl:when test="$mimeTypeStrategy = 'mimeType' and $mimeType != ''">
         <gcx:MimeFileType type="{$mimeType}">
           <xsl:value-of select="$protocol"/>
         </gcx:MimeFileType>
diff --git a/schemas/iso19139/src/main/plugin/iso19139/process/onlinesrc-add.xsl b/schemas/iso19139/src/main/plugin/iso19139/process/onlinesrc-add.xsl
index dafdcd1590b..6947108375b 100644
--- a/schemas/iso19139/src/main/plugin/iso19139/process/onlinesrc-add.xsl
+++ b/schemas/iso19139/src/main/plugin/iso19139/process/onlinesrc-add.xsl
@@ -518,7 +518,7 @@ Insert is made in first transferOptions found.
 
   <xsl:template name="setProtocol">
     <xsl:choose>
-      <xsl:when test="$mimeTypeStrategy = 'mimeType'">
+      <xsl:when test="$mimeTypeStrategy = 'mimeType' and $mimeType != ''">
         <gmx:MimeFileType type="{$mimeType}">
           <xsl:value-of select="$protocol"/>
         </gmx:MimeFileType>