diff --git a/linux/alsa/alsa_driver.c b/linux/alsa/alsa_driver.c
index 055ac369..68bb2472 100644
--- a/linux/alsa/alsa_driver.c
+++ b/linux/alsa/alsa_driver.c
@@ -314,15 +314,16 @@ alsa_driver_setup_io_function_pointers (alsa_driver_t *driver)
 				break;
 
 			case 4: /* NO DITHER */
-                switch (driver->playback_sample_format)
-                {
-                    case SND_PCM_FORMAT_S24_LE:
-                    case SND_PCM_FORMAT_S24_BE:
+				switch (driver->playback_sample_format)
+				{
+					case SND_PCM_FORMAT_S24_LE:
+					case SND_PCM_FORMAT_S24_BE:
 				driver->write_via_copy = driver->quirk_bswap?
 					sample_move_d32l24_sSs:
 					sample_move_d32l24_sS;
 				break;
-                    case SND_PCM_FORMAT_S32_LE:
+					case SND_PCM_FORMAT_S32_LE:
+					case SND_PCM_FORMAT_S32_BE:
 					{
 						int bits = snd_pcm_hw_params_get_sbits(driver->playback_hw_params);
 						if (bits == 32)
@@ -331,18 +332,25 @@ alsa_driver_setup_io_function_pointers (alsa_driver_t *driver)
 								sample_move_d32_sSs:
 								sample_move_d32_sS;
 						}
-						else
+						else if (bits == 24)
 						{
 							driver->write_via_copy = driver->quirk_bswap?
 								sample_move_d32u24_sSs:
 								sample_move_d32u24_sS;
 						}
-                        break;
+						else
+						{
+							jack_error("unsupported sample format for playback: "
+									   "SND_PCM_FORMAT_S32 with %d bits",
+									   bits);
+							exit (1);
+						}
+						break;
 					}
-                    default:
-                        jack_error("unsupported 4 byte sample_format");
-                        exit (1);
-                }
+					default:
+					jack_error("unsupported 4 byte sample_format");
+					exit (1);
+				}
 				break;
 
 			default:
@@ -378,6 +386,7 @@ alsa_driver_setup_io_function_pointers (alsa_driver_t *driver)
 					sample_move_dS_s32l24;
 				break;
 					case SND_PCM_FORMAT_S32_LE:
+					case SND_PCM_FORMAT_S32_BE:
 					{
 						int bits = snd_pcm_hw_params_get_sbits(driver->capture_hw_params);
 						if (bits == 32)
@@ -386,12 +395,19 @@ alsa_driver_setup_io_function_pointers (alsa_driver_t *driver)
 								sample_move_dS_s32s:
 								sample_move_dS_s32;
 						}
-						else
+						else if(bits == 24)
 						{
 							driver->read_via_copy = driver->quirk_bswap?
 								sample_move_dS_s32u24s:
 								sample_move_dS_s32u24;
 						}
+						else
+						{
+							jack_error("unsupported sample format for capture: "
+									   "SND_PCM_FORMAT_S32LE with %d bits",
+									   bits);
+							exit (1);
+						}
 						break;
 					}
 					default: