diff --git a/lib/errors.js b/lib/errors.js
index 0ae3385d..1dc358a9 100644
--- a/lib/errors.js
+++ b/lib/errors.js
@@ -103,6 +103,7 @@ const ERR_TOKEN_CALLBACK_DUP = 88;
 const ERR_NOT_IMPLEMENTED = 89;
 const ERR_INIT_ORACLE_CLIENT_ARGS = 90;
 const ERR_MISSING_FILE = 91;
+const ERR_INVALID_NUMBER_OF_CONNECTIONS = 92;
 
 const messages = new Map();
 messages.set(ERR_INVALID_CONNECTION,
@@ -256,6 +257,8 @@ messages.set(ERR_INIT_ORACLE_CLIENT_ARGS,
   'initOracleClient() was already called with different arguments!');
 messages.set(ERR_MISSING_FILE,
   'file %s is missing');
+messages.set(ERR_INVALID_NUMBER_OF_CONNECTIONS,
+  'poolMax [%d] must be greater than or equal to poolMin [%d]');
 
 //-----------------------------------------------------------------------------
 // assert()
@@ -487,6 +490,7 @@ module.exports = {
   ERR_NOT_IMPLEMENTED,
   ERR_INIT_ORACLE_CLIENT_ARGS,
   ERR_MISSING_FILE,
+  ERR_INVALID_NUMBER_OF_CONNECTIONS,
   assert,
   assertArgCount,
   assertParamPropBool,
diff --git a/lib/oracledb.js b/lib/oracledb.js
index 80bfe2f7..7808ec45 100644
--- a/lib/oracledb.js
+++ b/lib/oracledb.js
@@ -185,10 +185,10 @@ async function _verifyOptions(options, inCreatePool) {
   // check pool specific options
   if (inCreatePool) {
 
-    // poolMax must be an integer >= 0
+    // poolMax must be an integer > 0
     if (options.poolMax !== undefined) {
       errors.assertParamPropValue(Number.isInteger(options.poolMax) &&
-        options.poolMax >= 0, 1, "poolMax");
+        options.poolMax > 0, 1, "poolMax");
       outOptions.poolMax = options.poolMax;
     }
 
@@ -402,6 +402,12 @@ async function createPool(options) {
     "queueMax",
     "queueTimeout");
 
+  // poolMax must be greater than or equal to poolMin
+  if (options.poolMin > options.poolMax) {
+    errors.throwErr(errors.ERR_INVALID_NUMBER_OF_CONNECTIONS, options.poolMax,
+      options.poolMin);
+  }
+
   // initialize the Oracle client, if necessary
   if (_initOracleClientArgs === undefined) {
     initOracleClient();
diff --git a/test/pool.js b/test/pool.js
index 62736e21..280009eb 100644
--- a/test/pool.js
+++ b/test/pool.js
@@ -138,7 +138,7 @@ describe('2. pool.js', function() {
         },
         function(err, pool) {
           should.exist(err);
-          (err.message).should.startWith('ORA-24413:');
+          (err.message).should.startWith('NJS-092:');
 
           should.not.exist(pool);
           done();
@@ -213,7 +213,7 @@ describe('2. pool.js', function() {
         },
         function(err, pool) {
           should.exist(err);
-          (err.message).should.startWith('ORA-24413:');
+          (err.message).should.startWith('NJS-007:');
 
           should.not.exist(pool);
           done();
@@ -1046,8 +1046,7 @@ describe('2. pool.js', function() {
         },
         function(err, pool) {
           should.exist(err);
-          (err.message).should.startWith('ORA-24413: ');
-          // ORA-24413: Invalid number of sessions specified
+          (err.message).should.startWith('NJS-092:');
           should.not.exist(pool);
           done();
         }
diff --git a/test/poolReconfigure.js b/test/poolReconfigure.js
index 5d62d08f..dccd6904 100644
--- a/test/poolReconfigure.js
+++ b/test/poolReconfigure.js
@@ -1178,7 +1178,7 @@ describe('255. poolReconfigure.js', function() {
       try {
         await pool.reconfigure({poolMax: 0});
       } catch (err) {
-        (err.message).startsWith ('ORA-24413');
+        (err.message).startsWith ('NJS-007');
       }
 
       try {