diff --git a/lib/system.nim b/lib/system.nim
index b9f86f5493..cab8a91aa7 100644
--- a/lib/system.nim
+++ b/lib/system.nim
@@ -3927,7 +3927,7 @@ proc instantiationInfo*(index = -1, fullPaths = false): tuple[
 template currentSourcePath*: string = instantiationInfo(-1, true).filename
   ## returns the full file-system path of the current source
 
-proc raiseAssert*(msg: string) {.noinline.} =
+proc raiseAssert*(msg: string) {.noinline, noReturn.} =
   sysFatal(AssertionError, msg)
 
 proc failedAssertImpl*(msg: string) {.raises: [], tags: [].} =