diff --git a/include/ecrt.h b/include/ecrt.h
index bbe1043bb1aacaa63151d2b2e5e12c02e7e2cc6d..d113c7b3d23c9f2536b833cce00da1381334ba7c 100644
--- a/include/ecrt.h
+++ b/include/ecrt.h
@@ -246,7 +246,6 @@ typedef struct {
     uint16_t position; /**< Slave position. */
     uint32_t vendor_id; /**< Slave vendor ID. */
     uint32_t product_code; /**< Slave product code. */
-    uint32_t revision_number; /**< Slave revision number. */
     uint16_t index; /**< Pdo entry index. */
     uint8_t subindex; /**< Pdo entry subindex. */
     unsigned int *offset; /**< Pointer to a variable to store the Pdo entry's
@@ -351,8 +350,7 @@ ec_slave_config_t *ecrt_master_slave_config(
         uint16_t alias, /**< Slave alias. */
         uint16_t position, /**< Slave position. */
         uint32_t vendor_id, /**< Expected vendor ID. */
-        uint32_t product_code, /**< Expected product code. */
-        uint32_t revision_number /**< Expected revision number. */
+        uint32_t product_code /**< Expected product code. */
         );
 
 /** Finishes the configuration phase and prepares for realtime mode.
diff --git a/master/domain.c b/master/domain.c
index 78a7541eaeb9fdc3f2224ef5226a72ea4bfb5da9..bc54921954a1cdac4226dd2c24b1c2a8428f4c02 100644
--- a/master/domain.c
+++ b/master/domain.c
@@ -320,8 +320,7 @@ int ecrt_domain_reg_pdo_entry_list(ec_domain_t *domain,
     
     for (reg = regs; reg->index; reg++) {
         if (!(sc = ecrt_master_slave_config(domain->master, reg->alias,
-                        reg->position, reg->vendor_id, reg->product_code,
-                        reg->revision_number)))
+                        reg->position, reg->vendor_id, reg->product_code)))
             return -1;
 
         if ((ret = ecrt_slave_config_reg_pdo_entry(sc, reg->index,
diff --git a/master/master.c b/master/master.c
index 1e5ab8db202f7c2faf6170252ea104bb5a31b50a..f9a4ddea2d842ae35adc298d6f63676cd0f6da02 100644
--- a/master/master.c
+++ b/master/master.c
@@ -1287,7 +1287,7 @@ void ecrt_master_receive(ec_master_t *master)
 
 ec_slave_config_t *ecrt_master_slave_config(ec_master_t *master,
         uint16_t alias, uint16_t position, uint32_t vendor_id,
-        uint32_t product_code, uint32_t revision_number)
+        uint32_t product_code)
 {
     ec_slave_config_t *sc;
     unsigned int found = 0;
@@ -1304,21 +1304,18 @@ ec_slave_config_t *ecrt_master_slave_config(ec_master_t *master,
             EC_INFO("Using existing slave configuration for %u:%u\n",
                     alias, position);
         }
-        if (sc->vendor_id != vendor_id
-                || sc->product_code != product_code
-                || sc->revision_number != revision_number) {
+        if (sc->vendor_id != vendor_id || sc->product_code != product_code) {
             EC_ERR("Slave type mismatch. Slave was configured as"
-                    " 0x%08X/0x%08X/0x%08X before. Now configuring with"
-                    " 0x%08X/0x%08X/0x%08X.\n",
-                    sc->vendor_id, sc->product_code, sc->revision_number,
-                    vendor_id, product_code, revision_number);
+                    " 0x%08X/0x%08X before. Now configuring with"
+                    " 0x%08X/0x%08X.\n", sc->vendor_id, sc->product_code,
+                    vendor_id, product_code);
             return NULL;
         }
     } else {
         if (master->debug_level) {
             EC_INFO("Creating slave configuration for %u:%u,"
-                    " 0x%08X/0x%08X/0x%08X.\n", alias, position,
-                    vendor_id, product_code, revision_number);
+                    " 0x%08X/0x%08X.\n", alias, position, vendor_id,
+                    product_code);
         }
 
         if (!(sc = (ec_slave_config_t *) kmalloc(sizeof(ec_slave_config_t),
@@ -1328,7 +1325,7 @@ ec_slave_config_t *ecrt_master_slave_config(ec_master_t *master,
         }
 
         ec_slave_config_init(sc, master,
-                alias, position, vendor_id, product_code, revision_number);
+                alias, position, vendor_id, product_code);
 
         // try to find the addressed slave
         ec_slave_config_attach(sc);
diff --git a/master/slave_config.c b/master/slave_config.c
index 2118f687c166f783507066337c00af6a3557c9db..700bd15c88dec2c7fa7b9ffbac74f2c120f28316 100644
--- a/master/slave_config.c
+++ b/master/slave_config.c
@@ -58,8 +58,7 @@ void ec_slave_config_init(
         uint16_t alias, /**< Slave alias. */
         uint16_t position, /**< Slave position. */
         uint32_t vendor_id, /**< Expected vendor ID. */
-        uint32_t product_code, /**< Expected product code. */
-        uint32_t revision_number /**< Expected revision number. */
+        uint32_t product_code /**< Expected product code. */
         )
 {
     ec_direction_t dir;
@@ -69,7 +68,6 @@ void ec_slave_config_init(
     sc->position = position;
     sc->vendor_id = vendor_id;
     sc->product_code = product_code;
-    sc->revision_number = revision_number;
     sc->slave = NULL;
 
     for (dir = EC_DIR_OUTPUT; dir <= EC_DIR_INPUT; dir++)
@@ -188,14 +186,12 @@ int ec_slave_config_attach(
 		return -2;
 	}
 	if (slave->sii.vendor_id != sc->vendor_id
-			|| slave->sii.product_code != sc->product_code
-			|| slave->sii.revision_number != sc->revision_number) {
-		EC_ERR("Slave %u has an invalid type (0x%08X/0x%08X/0x%08X) for"
-				" configuration %u:%u (0x%08X/0x%08X/0x%08X).\n",
-				slave->ring_position,
-                slave->sii.vendor_id, slave->sii.product_code,
-                slave->sii.revision_number, sc->alias, sc->position,
-				sc->vendor_id, sc->product_code, sc->revision_number);
+			|| slave->sii.product_code != sc->product_code) {
+		EC_ERR("Slave %u has an invalid type (0x%08X/0x%08X) for"
+				" configuration %u:%u (0x%08X/0x%08X).\n",
+				slave->ring_position, slave->sii.vendor_id,
+				slave->sii.product_code, sc->alias, sc->position,
+				sc->vendor_id, sc->product_code);
 		return -3;
 	}
 
diff --git a/master/slave_config.h b/master/slave_config.h
index ed5630fb284becffd131f6b390a809939b9098c8..83abe7aa18408af3b747650ecb72bde03ee28c3c 100644
--- a/master/slave_config.h
+++ b/master/slave_config.h
@@ -63,7 +63,6 @@ struct ec_slave_config {
                          ring position. */
     uint32_t vendor_id; /**< Slave vendor ID. */
     uint32_t product_code; /**< Slave product code. */
-    uint32_t revision_number; /**< Slave revision number. */
 
     ec_slave_t *slave; /**< Slave pointer. This is \a NULL, if the slave is
                          offline. */
@@ -80,7 +79,7 @@ struct ec_slave_config {
 /*****************************************************************************/
 
 void ec_slave_config_init(ec_slave_config_t *, ec_master_t *, uint16_t,
-        uint16_t, uint32_t, uint32_t, uint32_t);
+        uint16_t, uint32_t, uint32_t);
 void ec_slave_config_clear(ec_slave_config_t *);
 
 int ec_slave_config_attach(ec_slave_config_t *);