diff --git a/sys/contrib/dev/acpica/dbcmds.c b/sys/contrib/dev/acpica/dbcmds.c
index f9a8ef321e3f..f913d4b4e2c5 100644
--- a/sys/contrib/dev/acpica/dbcmds.c
+++ b/sys/contrib/dev/acpica/dbcmds.c
@@ -1738,7 +1738,7 @@ AcpiDbBusWalk (
 
     /* Exit if there is no _PRT under this device */
 
-    Status = AcpiGetHandle (Node, METHOD_NAME__PRT, &TempNode);
+    Status = AcpiGetHandle (Node, METHOD_NAME__PRT, (ACPI_HANDLE *) &TempNode);
     if (ACPI_FAILURE (Status))
     {
         return (AE_OK);
diff --git a/sys/contrib/dev/acpica/osunixxf.c b/sys/contrib/dev/acpica/osunixxf.c
index b693305cb91c..91e11fda443c 100644
--- a/sys/contrib/dev/acpica/osunixxf.c
+++ b/sys/contrib/dev/acpica/osunixxf.c
@@ -187,7 +187,7 @@ AcpiOsGetRootPointer (
     ACPI_POINTER           *Address)
 {
 
-    return (AeLocalGetRootPointer(Flags, Address));
+    return (AeLocalGetRootPointer(Flags, (ACPI_PHYSICAL_ADDRESS *) Address));
 }
 
 
diff --git a/sys/contrib/dev/acpica/rsdump.c b/sys/contrib/dev/acpica/rsdump.c
index 8be18b5bbb9d..d59fb92a521e 100644
--- a/sys/contrib/dev/acpica/rsdump.c
+++ b/sys/contrib/dev/acpica/rsdump.c
@@ -452,11 +452,11 @@ AcpiRsDumpDescriptor (
         /* Strings */
 
         case ACPI_RSD_LITERAL:
-            AcpiRsOutString (Name, (char *) Table->Pointer);
+            AcpiRsOutString (Name, (char *) (uintptr_t) Table->Pointer);
             break;
 
         case ACPI_RSD_STRING:
-            AcpiRsOutString (Name, (char *) Target);
+            AcpiRsOutString (Name, (char *) (uintptr_t) Target);
             break;
 
         /* Data items, 8/16/32/64 bit */
@@ -480,13 +480,13 @@ AcpiRsDumpDescriptor (
         /* Flags: 1-bit and 2-bit flags supported */
 
         case ACPI_RSD_1BITFLAG:
-            AcpiRsOutString (Name, (char *)
-                ((const char **) Table->Pointer)[(*(UINT8 *) Target) & 0x01]);
+            AcpiRsOutString (Name, (char *) (uintptr_t)
+                ((const char **) (uintptr_t) Table->Pointer)[(*(UINT8 *) Target) & 0x01]);
             break;
 
         case ACPI_RSD_2BITFLAG:
-            AcpiRsOutString (Name, (char *)
-                ((const char **) Table->Pointer)[(*(UINT8 *) Target) & 0x03]);
+            AcpiRsOutString (Name, (char *) (uintptr_t)
+                ((const char **) (uintptr_t) Table->Pointer)[(*(UINT8 *) Target) & 0x03]);
             break;
 
         case ACPI_RSD_SHORTLIST:
diff --git a/sys/contrib/dev/acpica/utdebug.c b/sys/contrib/dev/acpica/utdebug.c
index 7d78a4cda3fb..884614075134 100644
--- a/sys/contrib/dev/acpica/utdebug.c
+++ b/sys/contrib/dev/acpica/utdebug.c
@@ -212,14 +212,14 @@ AcpiUtTrimFunctionName (
 
     /* All Function names are longer than 4 chars, check is safe */
 
-    if (*(ACPI_CAST_PTR (UINT32, FunctionName)) == ACPI_PREFIX_MIXED)
+    if (*((UINT32 *) (uintptr_t) FunctionName) == ACPI_PREFIX_MIXED)
     {
         /* This is the case where the original source has not been modified */
 
         return (FunctionName + 4);
     }
 
-    if (*(ACPI_CAST_PTR (UINT32, FunctionName)) == ACPI_PREFIX_LOWER)
+    if (*((UINT32 *) (uintptr_t) FunctionName) == ACPI_PREFIX_LOWER)
     {
         /* This is the case where the source has been 'linuxized' */