diff --git a/pafish/cpu.c b/pafish/cpu.c
index 8ecae79..fc8eca4 100644
--- a/pafish/cpu.c
+++ b/pafish/cpu.c
@@ -137,17 +137,19 @@ void cpu_write_brand(char * brand) {
 }
 
 int cpu_known_vm_vendors() {
-	const int count = 4;
+	const int count = 6;
 	int i;
-	char cpu_vendor[13];
+	char cpu_hv_vendor[13];
 	string strs[count];
-	strs[0] = "KVMKVMKVMKVM";
-	strs[1] = "Microsoft Hv";
-	strs[2] = "VMwareVMware";
-	strs[3] = "XenVMMXenVMM";
-	cpu_write_vendor(cpu_vendor);
+	strs[0] = "KVMKVMKVMKVM"; /* KVM */
+	strs[1] = "Microsoft Hv"; /* Microsoft Hyper-V or Windows Virtual PC */
+	strs[2] = "VMwareVMware"; /* VMware */
+	strs[3] = "XenVMMXenVMM"; /* Xen */
+	strs[4] = "prl hyperv  "; /* Parallels */
+	strs[5] = "VBoxVBoxVBox"; /* VirtualBox */
+	cpu_write_hv_vendor(cpu_hv_vendor);
 	for (i = 0; i < count; i++) {
-		if (!memcmp(cpu_vendor, strs[i], 12)) return TRUE;
+		if (!memcmp(cpu_hv_vendor, strs[i], 12)) return TRUE;
 	}
 	return FALSE;
 }
diff --git a/pafish/main.c b/pafish/main.c
index e2f4e1c..f84c222 100644
--- a/pafish/main.c
+++ b/pafish/main.c
@@ -107,10 +107,10 @@ int main(void)
 	exec_check("Checking hypervisor bit in cpuid feature bits", &cpu_hv,
 		   "CPU VM traced by checking hypervisor bit in cpuid feature bits",
 		   "hi_CPU_VM_hypervisor_bit");
-	exec_check("Checking cpuid vendor for known VM vendors",
+	exec_check("Checking cpuid hypervisor vendor for known VM vendors",
 		   &cpu_known_vm_vendors,
-		   "CPU VM traced by checking cpuid vendor for known VM vendors",
-		   "hi_CPU_VM_vendor_name");
+		   "CPU VM traced by checking cpuid hypervisor vendor for known VM vendors",
+		   "hi_CPU_VM_hv_vendor_name");
 
 	/* Generic sandbox detection tricks */
 	print_check_group("Generic sandbox detection");