diff --git a/src/allotropy/allotrope/schemas/adm/multi-analyte-profiling/REC/2024/09/multi-analyte-profiling.schema.json b/src/allotropy/allotrope/schemas/adm/multi-analyte-profiling/REC/2024/09/multi-analyte-profiling.schema.json
index ccbf76b25..41cda5151 100644
--- a/src/allotropy/allotrope/schemas/adm/multi-analyte-profiling/REC/2024/09/multi-analyte-profiling.schema.json
+++ b/src/allotropy/allotrope/schemas/adm/multi-analyte-profiling/REC/2024/09/multi-analyte-profiling.schema.json
@@ -11814,7 +11814,7 @@
           "properties": {
             "unit": {
               "type": "string",
-              "const": "μm",
+              "const": "µm",
               "$asm.unit-iri": "http://qudt.org/vocab/unit#Micrometer"
             }
           },