diff --git a/src/vendorcode/amd/agesa/f10/gcccar.inc b/src/vendorcode/amd/agesa/f10/gcccar.inc
index a24c0b7abe..70988b89b8 100755
--- a/src/vendorcode/amd/agesa/f10/gcccar.inc
+++ b/src/vendorcode/amd/agesa/f10/gcccar.inc
@@ -989,7 +989,7 @@ fam15_enable_stack_hook_exit:
 
     mov     $CU_CFG3, %ecx                # MSR:C001_102B
     _RDMSR
-    bts     $(COMBINE_CR0_CD - 32), %eax         # Set CombineCr0Cd bit
+    bts     $(COMBINE_CR0_CD - 32), %edx         # Set CombineCr0Cd bit
     _WRMSR
 
 fam15_disable_stack_hook_exit:
diff --git a/src/vendorcode/amd/agesa/f12/gcccar.inc b/src/vendorcode/amd/agesa/f12/gcccar.inc
index 63f3ea9d12..e7f2ec7bd7 100755
--- a/src/vendorcode/amd/agesa/f12/gcccar.inc
+++ b/src/vendorcode/amd/agesa/f12/gcccar.inc
@@ -983,7 +983,7 @@ fam15_enable_stack_hook_exit:
 
     mov     $CU_CFG3, %ecx                # MSR:C001_102B
     _RDMSR
-    bts     $(COMBINE_CR0_CD - 32), %eax         # Set CombineCr0Cd bit
+    bts     $(COMBINE_CR0_CD - 32), %edx         # Set CombineCr0Cd bit
     _WRMSR
 
 fam15_disable_stack_hook_exit:
diff --git a/src/vendorcode/amd/agesa/f14/gcccar.inc b/src/vendorcode/amd/agesa/f14/gcccar.inc
index d81b6afe70..fc1b1adaa4 100644
--- a/src/vendorcode/amd/agesa/f14/gcccar.inc
+++ b/src/vendorcode/amd/agesa/f14/gcccar.inc
@@ -997,7 +997,7 @@ fam15_enable_stack_hook_exit:
 
     mov     $CU_CFG3, %ecx                # MSR:C001_102B
     _RDMSR
-    bts     $(COMBINE_CR0_CD - 32), %eax         # Set CombineCr0Cd bit
+    bts     $(COMBINE_CR0_CD - 32), %edx         # Set CombineCr0Cd bit
     _WRMSR
 
 fam15_disable_stack_hook_exit:
diff --git a/src/vendorcode/amd/agesa/f15/gcccar.inc b/src/vendorcode/amd/agesa/f15/gcccar.inc
index 423d404469..3627da6df3 100644
--- a/src/vendorcode/amd/agesa/f15/gcccar.inc
+++ b/src/vendorcode/amd/agesa/f15/gcccar.inc
@@ -1004,7 +1004,7 @@ fam15_enable_stack_hook_exit:
 
     mov     $CU_CFG3, %ecx                # MSR:C001_102B
     _RDMSR
-    bts     $(COMBINE_CR0_CD - 32), %eax         # Set CombineCr0Cd bit
+    bts     $(COMBINE_CR0_CD - 32), %edx         # Set CombineCr0Cd bit
     _WRMSR
 
 fam15_disable_stack_hook_exit: