diff --git a/src/kernel/core/addons/bus_managers/config_manager.c b/src/kernel/core/addons/bus_managers/config_manager.c
index d24b8528ff..bc9c71f9c6 100644
--- a/src/kernel/core/addons/bus_managers/config_manager.c
+++ b/src/kernel/core/addons/bus_managers/config_manager.c
@@ -26,7 +26,7 @@ static status_t cfdm_get_next_device_info(bus_type bus, uint64 *cookie,
 }
 	
 /* device_modules */
-static int cfdm_std_ops(int32 op, ...)
+static int32 cfdm_std_ops(int32 op, ...)
 {
 	switch(op) {
 		case B_MODULE_INIT:
@@ -46,7 +46,7 @@ static int cfdm_std_ops(int32 op, ...)
 }
 
 /* bus_modules */
-static int cfbm_std_ops(int32 op, ...)
+static int32 cfbm_std_ops(int32 op, ...)
 {
 	switch(op) {
 		case B_MODULE_INIT:
diff --git a/src/kernel/core/addons/bus_managers/isa/isa.c b/src/kernel/core/addons/bus_managers/isa/isa.c
index e70ee82597..333362be9b 100755
--- a/src/kernel/core/addons/bus_managers/isa/isa.c
+++ b/src/kernel/core/addons/bus_managers/isa/isa.c
@@ -80,7 +80,7 @@ static long unlock_isa_dma_channel(long channel)
 	return ENOSYS;
 }
 
-static int std_ops(int32 op, ...)
+static int32 std_ops(int32 op, ...)
 {
 	switch(op) {
 		case B_MODULE_INIT:
diff --git a/src/kernel/core/addons/bus_managers/pci/pci.c b/src/kernel/core/addons/bus_managers/pci/pci.c
index 2178cae6f0..d6c031ea85 100755
--- a/src/kernel/core/addons/bus_managers/pci/pci.c
+++ b/src/kernel/core/addons/bus_managers/pci/pci.c
@@ -1373,7 +1373,7 @@ pci_module_uninit(void)
 }
 
 
-static int
+static int32
 std_ops(int32 op, ...)
 {
 	switch(op) {