diff --git a/support-portal-backend/src/main/java/net/shyshkin/study/fullstack/supportportal/backend/service/ProfessorServiceImpl.java b/support-portal-backend/src/main/java/net/shyshkin/study/fullstack/supportportal/backend/service/ProfessorServiceImpl.java
index 6aa4924..138992d 100644
--- a/support-portal-backend/src/main/java/net/shyshkin/study/fullstack/supportportal/backend/service/ProfessorServiceImpl.java
+++ b/support-portal-backend/src/main/java/net/shyshkin/study/fullstack/supportportal/backend/service/ProfessorServiceImpl.java
@@ -78,16 +78,19 @@ public class ProfessorServiceImpl implements ProfessorService {
         return addNewProfessor(professorDto);
     }
 
+    // ✅ FIXED: Changed from DEFAULT_USER_IMAGE_URI_PATTERN to DEFAULT_PROFESSOR_IMAGE_URI_PATTERN
     private String generateDefaultProfileImageUrl(UUID professorId) {
         return ServletUriComponentsBuilder.fromCurrentContextPath()
-                .path(String.format(DEFAULT_USER_IMAGE_URI_PATTERN, professorId))
+                .path(String.format(DEFAULT_PROFESSOR_IMAGE_URI_PATTERN, professorId))
                 .toUriString();
     }
 
+    // ✅ FIXED: Changed from DEFAULT_USER_IMAGE_URI_PATTERN to DEFAULT_PROFESSOR_IMAGE_URI_PATTERN
+    // ✅ FIXED: Changed from USER_IMAGE_FILENAME to PROFESSOR_IMAGE_FILENAME
     private String generateProfileImageUrl(UUID professorId) {
         return ServletUriComponentsBuilder.fromCurrentContextPath()
-                .path(String.format(DEFAULT_USER_IMAGE_URI_PATTERN, professorId))
-                .pathSegment(USER_IMAGE_FILENAME)
+                .path(String.format(DEFAULT_PROFESSOR_IMAGE_URI_PATTERN, professorId))
+                .pathSegment(PROFESSOR_IMAGE_FILENAME)
                 .toUriString();
     }
 
@@ -131,6 +134,7 @@ public class ProfessorServiceImpl implements ProfessorService {
                 .orElseThrow(() -> new ProfessorNotFoundException(PROFESSOR_NOT_FOUND_MSG));
     }
 
+    // ✅ FIXED: Changed from USER_IMAGE_FILENAME to PROFESSOR_IMAGE_FILENAME
     private void saveProfileImage(Professor professor, MultipartFile profileImage) {
         if (profileImage == null) return;
 
@@ -138,7 +142,7 @@ public class ProfessorServiceImpl implements ProfessorService {
             throw new NotAnImageFileException(profileImage.getOriginalFilename() + " is not an image file. Please upload an image");
         }
 
-        String imageUrl = profileImageService.persistProfileImage(professor.getProfessorId(), profileImage, USER_IMAGE_FILENAME);
+        String imageUrl = profileImageService.persistProfileImage(professor.getProfessorId(), profileImage, PROFESSOR_IMAGE_FILENAME);
 
         if (imageUrl == null)
             imageUrl = generateProfileImageUrl(professor.getProfessorId());