diff --git a/libctru/include/3ds/svc.h b/libctru/include/3ds/svc.h
index 402194d..0de77b0 100644
--- a/libctru/include/3ds/svc.h
+++ b/libctru/include/3ds/svc.h
@@ -48,5 +48,6 @@ s32  svcGetProcessInfo(s64* out, Handle process, u32 type);
 s32  svcConnectToPort(volatile Handle* out, const char* portName);
 s32  svcSendSyncRequest(Handle session);
 s32  svcGetProcessId(u32 *out, Handle handle);
+s32  svcOutputDebugString(const char* str, int length);
 
 #endif
diff --git a/libctru/source/svc.s b/libctru/source/svc.s
index 1969ddc..98ab6b3 100644
--- a/libctru/source/svc.s
+++ b/libctru/source/svc.s
@@ -195,3 +195,13 @@ svcGetProcessId:
 	ldr r3, [sp], #4
 	str r1, [r3]
 	bx lr
+
+.global svcOutputDebugString
+.type svcOutputDebugString, %function
+svcOutputDebugString:
+   str r0, [sp,#-0x4]!
+   svc 0x3D
+   ldr r2, [sp], #4
+   str r1, [r2]
+   bx lr
+