diff --git a/backend/web/server/plugins/sosynpl/functions.js b/backend/web/server/plugins/sosynpl/functions.js
index 493f46da19..c0d0239312 100644
--- a/backend/web/server/plugins/sosynpl/functions.js
+++ b/backend/web/server/plugins/sosynpl/functions.js
@@ -306,6 +306,7 @@ caster: {
   options: { ref: 'application' }
 },})
 declareVirtualField({model: 'announce', field: 'expertises_count', instance: 'Number', requires: 'expertises'})
+declareVirtualField({model: 'announce', field: 'pinned_expertises_count', instance: 'Number', requires: 'pinned_expertises'})
 declareVirtualField({model: 'announce', field: 'received_applications_count', instance: 'Number'})
 declareEnumField({model: 'announce', field: 'experience', enumValues: EXPERIENCE})
 declareVirtualField({model: 'announce', field: 'average_daily_rate', instance: 'Number', requires:'duration,duration_unit,budget'})
diff --git a/backend/web/server/plugins/sosynpl/schemas/AnnounceSchema.js b/backend/web/server/plugins/sosynpl/schemas/AnnounceSchema.js
index fe8626451b..32ea01ffff 100644
--- a/backend/web/server/plugins/sosynpl/schemas/AnnounceSchema.js
+++ b/backend/web/server/plugins/sosynpl/schemas/AnnounceSchema.js
@@ -340,6 +340,13 @@ AnnounceSchema.virtual('expertises_count', {
     count: true,
 })
 
+AnnounceSchema.virtual('pinned_expertises_count', {
+    ref: 'expertise',
+    foreignField: '_id',
+    localField: 'pinned_expertises',
+    count: true,
+})
+
 AnnounceSchema.virtual('average_daily_rate', DUMMY_REF).get(function() {
   if (!!this.duration && !!this.duration_unit && !!this.budget) {
     return this.budget/(this.duration*DURATION_UNIT_WORK_DAYS[this.duration_unit])