diff --git a/nx/include/switch/kernel/svc.h b/nx/include/switch/kernel/svc.h
index 26a149da..bb36580e 100644
--- a/nx/include/switch/kernel/svc.h
+++ b/nx/include/switch/kernel/svc.h
@@ -40,6 +40,8 @@ typedef enum {
     MemType_KernelStack=0x13,         ///< Mapped in kernel during \ref svcCreateThread.
     MemType_CodeReadOnly=0x14,        ///< Mapped in kernel during \ref svcControlCodeMemory.
     MemType_CodeWritable=0x15,        ///< Mapped in kernel during \ref svcControlCodeMemory.
+    MemType_Coverage=0x16,            ///< Not available.
+    MemType_Insecure=0x17,            ///< Mapped in kernel during \ref svcMapInsecureMemory.
 } MemoryType;
 
 /// Memory state bitmasks.
@@ -1568,3 +1570,22 @@ Result svcSetResourceLimitLimitValue(Handle reslimit, LimitableResource which, u
 void svcCallSecureMonitor(SecmonArgs* regs);
 
 ///@}
+
+///@name Memory management
+///@{
+
+/**
+ * @brief Maps new insecure memory at the desired address. [15.0.0+]
+ * @return Result code.
+ * @note Syscall number 0x90.
+ */
+Result svcMapInsecureMemory(void *address, u64 size);
+
+/**
+ * @brief Undoes the effects of \ref svcMapInsecureMemory. [15.0.0+]
+ * @return Result code.
+ * @note Syscall number 0x91.
+ */
+Result svcUnmapInsecureMemory(void *address, u64 size);
+
+///@}
\ No newline at end of file
diff --git a/nx/source/kernel/svc.s b/nx/source/kernel/svc.s
index a4352227..d4d49528 100644
--- a/nx/source/kernel/svc.s
+++ b/nx/source/kernel/svc.s
@@ -798,3 +798,13 @@ SVC_BEGIN svcCallSecureMonitor
 	stp x6, x7, [x8, #0x30]
 	ret
 SVC_END
+
+SVC_BEGIN svcMapInsecureMemory
+	svc 0x90
+	ret
+SVC_END
+
+SVC_BEGIN svcUnmapInsecureMemory
+	svc 0x91
+	ret
+SVC_END