diff --git a/spring-ai-spring-boot-autoconfigure/src/main/java/org/springframework/ai/autoconfigure/vectorstore/pgvector/PgVectorStoreProperties.java b/spring-ai-spring-boot-autoconfigure/src/main/java/org/springframework/ai/autoconfigure/vectorstore/pgvector/PgVectorStoreProperties.java
index 75b353466f3..c99382a89ed 100644
--- a/spring-ai-spring-boot-autoconfigure/src/main/java/org/springframework/ai/autoconfigure/vectorstore/pgvector/PgVectorStoreProperties.java
+++ b/spring-ai-spring-boot-autoconfigure/src/main/java/org/springframework/ai/autoconfigure/vectorstore/pgvector/PgVectorStoreProperties.java
@@ -33,7 +33,7 @@ public class PgVectorStoreProperties {
 
 	private PgIndexType indexType = PgIndexType.HNSW;
 
-	private PgDistanceType distanceType = PgDistanceType.CosineDistance;
+	private PgDistanceType distanceType = PgDistanceType.COSINE_DISTANCE;
 
 	private boolean removeExistingVectorStoreTable = false;
 
diff --git a/spring-ai-spring-boot-autoconfigure/src/test/java/org/springframework/ai/autoconfigure/vectorstore/pgvector/PgVectorStorePropertiesTests.java b/spring-ai-spring-boot-autoconfigure/src/test/java/org/springframework/ai/autoconfigure/vectorstore/pgvector/PgVectorStorePropertiesTests.java
index d2441a8a0a7..8b3798db5ee 100644
--- a/spring-ai-spring-boot-autoconfigure/src/test/java/org/springframework/ai/autoconfigure/vectorstore/pgvector/PgVectorStorePropertiesTests.java
+++ b/spring-ai-spring-boot-autoconfigure/src/test/java/org/springframework/ai/autoconfigure/vectorstore/pgvector/PgVectorStorePropertiesTests.java
@@ -33,7 +33,7 @@ public class PgVectorStorePropertiesTests {
 	public void defaultValues() {
 		var props = new PgVectorStoreProperties();
 		assertThat(props.getDimensions()).isEqualTo(PgVectorStore.INVALID_EMBEDDING_DIMENSION);
-		assertThat(props.getDistanceType()).isEqualTo(PgDistanceType.CosineDistance);
+		assertThat(props.getDistanceType()).isEqualTo(PgDistanceType.COSINE_DISTANCE);
 		assertThat(props.getIndexType()).isEqualTo(PgIndexType.HNSW);
 		assertThat(props.isRemoveExistingVectorStoreTable()).isFalse();
 	}
@@ -43,12 +43,12 @@ public void customValues() {
 		var props = new PgVectorStoreProperties();
 
 		props.setDimensions(1536);
-		props.setDistanceType(PgDistanceType.EuclideanDistance);
+		props.setDistanceType(PgDistanceType.EUCLIDEAN_DISTANCE);
 		props.setIndexType(PgIndexType.IVFFLAT);
 		props.setRemoveExistingVectorStoreTable(true);
 
 		assertThat(props.getDimensions()).isEqualTo(1536);
-		assertThat(props.getDistanceType()).isEqualTo(PgDistanceType.EuclideanDistance);
+		assertThat(props.getDistanceType()).isEqualTo(PgDistanceType.EUCLIDEAN_DISTANCE);
 		assertThat(props.getIndexType()).isEqualTo(PgIndexType.IVFFLAT);
 		assertThat(props.isRemoveExistingVectorStoreTable()).isTrue();
 	}
diff --git a/vector-stores/spring-ai-pgvector-store/src/main/java/org/springframework/ai/vectorstore/PgVectorStore.java b/vector-stores/spring-ai-pgvector-store/src/main/java/org/springframework/ai/vectorstore/PgVectorStore.java
index 76dbfab0d9d..fbba123f073 100644
--- a/vector-stores/spring-ai-pgvector-store/src/main/java/org/springframework/ai/vectorstore/PgVectorStore.java
+++ b/vector-stores/spring-ai-pgvector-store/src/main/java/org/springframework/ai/vectorstore/PgVectorStore.java
@@ -116,17 +116,17 @@ public enum PgDistanceType {
 		// embeddings), use inner product for best performance.
 		// The Sentence transformers are NOT normalized:
 		// https://github.com/UKPLab/sentence-transformers/issues/233
-		EuclideanDistance("<->", "vector_l2_ops",
+		EUCLIDEAN_DISTANCE("<->", "vector_l2_ops",
 				"SELECT *, embedding <-> ? AS distance FROM %s WHERE embedding <-> ? < ? %s ORDER BY distance LIMIT ? "),
 
 		// NOTE: works only if If vectors are normalized to length 1 (like OpenAI
 		// embeddings), use inner product for best performance.
 		// The Sentence transformers are NOT normalized:
 		// https://github.com/UKPLab/sentence-transformers/issues/233
-		NegativeInnerProduct("<#>", "vector_ip_ops",
+		NEGATIVE_INNER_PRODUCT("<#>", "vector_ip_ops",
 				"SELECT *, (1 + (embedding <#> ?)) AS distance FROM %s WHERE (1 + (embedding <#> ?)) < ? %s ORDER BY distance LIMIT ? "),
 
-		CosineDistance("<=>", "vector_cosine_ops",
+		COSINE_DISTANCE("<=>", "vector_cosine_ops",
 				"SELECT *, embedding <=> ? AS distance FROM %s WHERE embedding <=> ? < ? %s ORDER BY distance LIMIT ? ");
 
 		public final String operator;
@@ -197,12 +197,12 @@ private Map<String, Object> toMap(PGobject pgObject) {
 	}
 
 	public PgVectorStore(JdbcTemplate jdbcTemplate, EmbeddingClient embeddingClient) {
-		this(jdbcTemplate, embeddingClient, INVALID_EMBEDDING_DIMENSION, PgVectorStore.PgDistanceType.CosineDistance,
+		this(jdbcTemplate, embeddingClient, INVALID_EMBEDDING_DIMENSION, PgVectorStore.PgDistanceType.COSINE_DISTANCE,
 				false, PgIndexType.NONE);
 	}
 
 	public PgVectorStore(JdbcTemplate jdbcTemplate, EmbeddingClient embeddingClient, int dimensions) {
-		this(jdbcTemplate, embeddingClient, dimensions, PgVectorStore.PgDistanceType.CosineDistance, false,
+		this(jdbcTemplate, embeddingClient, dimensions, PgVectorStore.PgDistanceType.COSINE_DISTANCE, false,
 				PgIndexType.NONE);
 	}