diff --git a/eo-maven-plugin/src/main/resources/org/eolang/maven/phi/to-phi.xsl b/eo-maven-plugin/src/main/resources/org/eolang/maven/phi/to-phi.xsl
index 9c24598e38..793c492a73 100644
--- a/eo-maven-plugin/src/main/resources/org/eolang/maven/phi/to-phi.xsl
+++ b/eo-maven-plugin/src/main/resources/org/eolang/maven/phi/to-phi.xsl
@@ -277,7 +277,7 @@ SOFTWARE.
       <!-- Not method -->
       <xsl:when test="not(starts-with(@base, '.'))">
         <xsl:choose>
-          <xsl:when test="@ref">
+          <xsl:when test="@ref and not(@data)">
             <xsl:value-of select="eo:add-xi(true())"/>
             <xsl:apply-templates select="." mode="path">
               <xsl:with-param name="find" select="@base"/>
diff --git a/eo-maven-plugin/src/test/resources/org/eolang/maven/phi/yaml/bytes.yaml b/eo-maven-plugin/src/test/resources/org/eolang/maven/phi/yaml/bytes.yaml
index 11031f7b1d..2d0c289f5a 100644
--- a/eo-maven-plugin/src/test/resources/org/eolang/maven/phi/yaml/bytes.yaml
+++ b/eo-maven-plugin/src/test/resources/org/eolang/maven/phi/yaml/bytes.yaml
@@ -114,7 +114,7 @@ phi: |
             ⟧,
             as-bool ↦ ⟦
               φ ↦ ξ.ρ.eq(
-                α0 ↦ ξ.σ.σ.Φ.org.eolang.bytes(
+                α0 ↦ Φ.org.eolang.bytes(
                   Δ ⤍ 01-
                 )
               )