diff --git a/ddbridge/ddbridge-core.c b/ddbridge/ddbridge-core.c
index 481d07e..3a50e4f 100644
--- a/ddbridge/ddbridge-core.c
+++ b/ddbridge/ddbridge-core.c
@@ -252,7 +252,7 @@ static int dma_alloc(struct pci_dev *pdev, struct ddb_dma *dma, int dir)
 		return 0;
 	for (i = 0; i < dma->num; i++) {
 		if (alt_dma) {
-#if (KERNEL_VERSION(4, 12, 0) >= LINUX_VERSION_CODE)
+#if (KERNEL_VERSION(4, 13, 0) > LINUX_VERSION_CODE)
 			dma->vbuf[i] = kmalloc(dma->size, __GFP_REPEAT);
 #else
 			dma->vbuf[i] = kmalloc(dma->size, __GFP_RETRY_MAYFAIL);
@@ -3362,7 +3362,7 @@ static const struct file_operations ddb_fops = {
 	.release        = ddb_release,
 };
 
-#if (KERNEL_VERSION(3, 4, 0) >= LINUX_VERSION_CODE)
+#if (KERNEL_VERSION(3, 4, 0) > LINUX_VERSION_CODE)
 static char *ddb_devnode(struct device *device, mode_t *mode)
 #else
 static char *ddb_devnode(struct device *device, umode_t *mode)
diff --git a/ddbridge/ddbridge-main.c b/ddbridge/ddbridge-main.c
index 245a5d5..02ac613 100644
--- a/ddbridge/ddbridge-main.c
+++ b/ddbridge/ddbridge-main.c
@@ -86,7 +86,7 @@ static void __devexit ddb_remove(struct pci_dev *pdev)
 	pci_disable_device(pdev);
 }
 
-#if (KERNEL_VERSION(3, 8, 0) < LINUX_VERSION_CODE)
+#if (KERNEL_VERSION(3, 8, 0) <= LINUX_VERSION_CODE)
 #define __devinit
 #define __devinitdata
 #endif
@@ -97,8 +97,8 @@ static int __devinit ddb_irq_msi(struct ddb *dev, int nr)
 
 #ifdef CONFIG_PCI_MSI
 	if (msi && pci_msi_enabled()) {
-#if (KERNEL_VERSION(3, 15, 0) < LINUX_VERSION_CODE)
-#if (KERNEL_VERSION(4, 11, 0) < LINUX_VERSION_CODE)
+#if (KERNEL_VERSION(3, 15, 0) <= LINUX_VERSION_CODE)
+#if (KERNEL_VERSION(4, 11, 0) <= LINUX_VERSION_CODE)
 		stat = pci_alloc_irq_vectors(dev->pdev, 1, nr, PCI_IRQ_MSI);
 #else
 		stat = pci_enable_msi_range(dev->pdev, 1, nr);
diff --git a/ddbridge/ddbridge.h b/ddbridge/ddbridge.h
index fe38a75..b4b3b0a 100644
--- a/ddbridge/ddbridge.h
+++ b/ddbridge/ddbridge.h
@@ -28,7 +28,7 @@
 
 #include <linux/version.h>
 
-#if (KERNEL_VERSION(3, 8, 0) < LINUX_VERSION_CODE)
+#if (KERNEL_VERSION(3, 8, 0) <= LINUX_VERSION_CODE)
 #define __devexit
 #define __devinit
 #define __devinitconst