diff --git a/src/main/java/io/ebeaninternal/server/expression/InPairsExpression.java b/src/main/java/io/ebeaninternal/server/expression/InPairsExpression.java
index 9b2c5c5f1..2147af1a2 100644
--- a/src/main/java/io/ebeaninternal/server/expression/InPairsExpression.java
+++ b/src/main/java/io/ebeaninternal/server/expression/InPairsExpression.java
@@ -92,11 +92,6 @@ class InPairsExpression extends AbstractExpression {
       return;
     }
 
-
-    StringBuilder sb = new StringBuilder();
-
-    request.getDbPlatformHandler().concat(property0, separator, property1, suffix);
-
     request.append(request.getDbPlatformHandler().concat(property0, separator, property1, suffix));
     request.appendInExpression(not, concatBindValues);
   }
diff --git a/src/main/java/io/ebeaninternal/server/expression/platform/BaseDbExpression.java b/src/main/java/io/ebeaninternal/server/expression/platform/BaseDbExpression.java
index 8879c84f4..40ae04a1d 100644
--- a/src/main/java/io/ebeaninternal/server/expression/platform/BaseDbExpression.java
+++ b/src/main/java/io/ebeaninternal/server/expression/platform/BaseDbExpression.java
@@ -49,8 +49,7 @@ abstract class BaseDbExpression implements DbExpressionHandler {
   @Override
   public String concat(String property0, String separator, String property1, String suffix) {
     StringBuilder sb = new StringBuilder();
-    sb.append("CONCAT(").append(property0).append(",'").append(separator).append("',").append(property1);
-
+    sb.append("concat(").append(property0).append(",'").append(separator).append("',").append(property1);
     if (suffix != null && !suffix.isEmpty()) {
       sb.append(",'").append(suffix).append('\'');
     }
diff --git a/src/test/java/org/tests/model/basic/cache/TestCacheViaComplexNaturalKey3.java b/src/test/java/org/tests/model/basic/cache/TestCacheViaComplexNaturalKey3.java
index c9e698890..9a42ea601 100644
--- a/src/test/java/org/tests/model/basic/cache/TestCacheViaComplexNaturalKey3.java
+++ b/src/test/java/org/tests/model/basic/cache/TestCacheViaComplexNaturalKey3.java
@@ -277,11 +277,11 @@ public class TestCacheViaComplexNaturalKey3 extends BaseTestCase {
     assertBeanCacheHitMiss(1, 0);
 
     if (isH2()) {
-      assertThat(sql.get(0)).contains("from o_cached_natkey3 t0 where t0.store = ?  and CONCAT(t0.sku,'-',t0.code) in (?, ? )  order by t0.sku desc; --bind(def,Array[2]={2-1000,3-1000})");
+      assertThat(sql.get(0)).contains("from o_cached_natkey3 t0 where t0.store = ?  and concat(t0.sku,'-',t0.code) in (?, ? )  order by t0.sku desc; --bind(def,Array[2]={2-1000,3-1000})");
     } else if (isPostgres()) {
       assertThat(sql.get(0)).contains("from o_cached_natkey3 t0 where t0.store = ?  and (t0.sku||'-'||t0.code)");
     } else {
-      assertThat(sql.get(0)).contains("from o_cached_natkey3 t0 where t0.store = ?  and CONCAT(t0.sku,'-',t0.code)");
+      assertThat(sql.get(0)).contains("from o_cached_natkey3 t0 where t0.store = ?  and concat(t0.sku,'-',t0.code)");
     }
 
   }
@@ -316,11 +316,11 @@ public class TestCacheViaComplexNaturalKey3 extends BaseTestCase {
     assertBeanCacheHitMiss(1, 0);
 
     if (isH2()) {
-      assertThat(sql.get(0)).contains("from o_cached_natkey3 t0 where t0.store = ?  and CONCAT(t0.sku,':',t0.code,'-foo') in (?, ? )  order by t0.sku desc; --bind(def,Array[2]={2:1000-foo,3:1000-foo})");
+      assertThat(sql.get(0)).contains("from o_cached_natkey3 t0 where t0.store = ?  and concat(t0.sku,':',t0.code,'-foo') in (?, ? )  order by t0.sku desc; --bind(def,Array[2]={2:1000-foo,3:1000-foo})");
     } else if (isPostgres()){
       assertThat(sql.get(0)).contains("from o_cached_natkey3 t0 where t0.store = ?  and (t0.sku||':'||t0.code||'-foo')");
     } else {
-      assertThat(sql.get(0)).contains("from o_cached_natkey3 t0 where t0.store = ?  and CONCAT(t0.sku,':',t0.code,'-foo')");
+      assertThat(sql.get(0)).contains("from o_cached_natkey3 t0 where t0.store = ?  and concat(t0.sku,':',t0.code,'-foo')");
     }
 
   }