diff --git a/libctru/include/3ds.h b/libctru/include/3ds.h
index a1ee5ad..aedbef1 100644
--- a/libctru/include/3ds.h
+++ b/libctru/include/3ds.h
@@ -10,6 +10,7 @@ extern "C" {
 
 //might be missing some
 #include <3ds/types.h>
+#include <3ds/result.h>
 #include <3ds/ipc.h>
 #include <3ds/svc.h>
 #include <3ds/srv.h>
diff --git a/libctru/include/3ds/result.h b/libctru/include/3ds/result.h
new file mode 100644
index 0000000..1e2cba8
--- /dev/null
+++ b/libctru/include/3ds/result.h
@@ -0,0 +1,88 @@
+/**
+ * @file result.h
+ * @brief 3DS result code tools
+ */
+#pragma once
+#include "types.h"
+
+/// Checks whether a result code indicates success.
+#define R_SUCCEEDED(res)   ((res)>=0)
+/// Checks whether a result code indicates failure.
+#define R_FAILED(res)      ((res)<0)
+/// Returns the level of a result code.
+#define R_LEVEL(res)       (((res)>>27)&0x1F)
+/// Returns the summary of a result code.
+#define R_SUMMARY(res)     (((res)>>21)&0x3F)
+/// Returns the module ID of a result code.
+#define R_MODULE(res)      (((res)>>10)&0xFF)
+/// Returns the description of a result code.
+#define R_DESCRIPTION(res) ((res)&0x3FF)
+
+/// Builds a result code from its constituent components.
+#define MAKERESULT(level,summary,module,description) \
+	((((level)&0x1F)<<27) | (((summary)&0x3F)<<21) | (((module)&0xFF)<<10) | ((description)&0x3FF))
+
+/// Result code level values.
+enum
+{
+	// >= 0
+	RL_SUCCESS = 0,
+	RL_INFO    = 1,
+
+	// < 0
+	RL_FATAL        = 0x1F,
+	RL_RESET        = RL_FATAL - 1,
+	RL_REINITIALIZE = RL_FATAL - 2,
+	RL_USAGE        = RL_FATAL - 3,
+	RL_PERMANENT    = RL_FATAL - 4,
+	RL_TEMPORARY    = RL_FATAL - 5,
+	RL_STATUS       = RL_FATAL - 6,
+};
+
+/// Result code summary values.
+enum
+{
+	RS_SUCCESS       = 0,
+	RS_NOP           = 1,
+	RS_WOULDBLOCK    = 2,
+	RS_OUTOFRESOURCE = 3,
+	RS_NOTFOUND      = 4,
+	RS_INVALIDSTATE  = 5,
+	RS_NOTSUPPORTED  = 6,
+	RS_INVALIDARG    = 7,
+	RS_WRONGARG      = 8,
+	RS_CANCELED      = 9,
+	RS_STATUSCHANGED = 10,
+	RS_INTERNAL      = 11,
+	RS_INVALIDRESVAL = 63,
+};
+
+/// Result code generic description values.
+enum
+{
+	RD_SUCCESS              = 0,
+	RD_INVALID_RESULT_VALUE = 0x3FF,
+	RD_TIMEOUT              = RD_INVALID_RESULT_VALUE -  1,
+	RD_OUT_OF_RANGE         = RD_INVALID_RESULT_VALUE -  2,
+	RD_ALREADY_EXISTS       = RD_INVALID_RESULT_VALUE -  3,
+	RD_CANCEL_REQUESTED     = RD_INVALID_RESULT_VALUE -  4,
+	RD_NOT_FOUND            = RD_INVALID_RESULT_VALUE -  5,
+	RD_ALREADY_INITIALIZED  = RD_INVALID_RESULT_VALUE -  6,
+	RD_NOT_INITIALIZED      = RD_INVALID_RESULT_VALUE -  7,
+	RD_INVALID_HANDLE       = RD_INVALID_RESULT_VALUE -  8,
+	RD_INVALID_POINTER      = RD_INVALID_RESULT_VALUE -  9,
+	RD_INVALID_ADDRESS      = RD_INVALID_RESULT_VALUE - 10,
+	RD_NOT_IMPLEMENTED      = RD_INVALID_RESULT_VALUE - 11,
+	RD_OUT_OF_MEMORY        = RD_INVALID_RESULT_VALUE - 12,
+	RD_MISALIGNED_SIZE      = RD_INVALID_RESULT_VALUE - 13,
+	RD_MISALIGNED_ADDRESS   = RD_INVALID_RESULT_VALUE - 14,
+	RD_BUSY                 = RD_INVALID_RESULT_VALUE - 15,
+	RD_NO_DATA              = RD_INVALID_RESULT_VALUE - 16,
+	RD_INVALID_COMBINATION  = RD_INVALID_RESULT_VALUE - 17,
+	RD_INVALID_ENUM_VALUE   = RD_INVALID_RESULT_VALUE - 18,
+	RD_INVALID_SIZE         = RD_INVALID_RESULT_VALUE - 19,
+	RD_ALREADY_DONE         = RD_INVALID_RESULT_VALUE - 20,
+	RD_NOT_AUTHORIZED       = RD_INVALID_RESULT_VALUE - 21,
+	RD_TOO_LARGE            = RD_INVALID_RESULT_VALUE - 22,
+	RD_INVALID_SELECTION    = RD_INVALID_RESULT_VALUE - 23,
+};