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-rw-r--r--compiler/rodutils.nim2
1 files changed, 1 insertions, 1 deletions
diff --git a/compiler/rodutils.nim b/compiler/rodutils.nim
index 4433ed4ab..09b92cd8a 100644
--- a/compiler/rodutils.nim
+++ b/compiler/rodutils.nim
@@ -10,7 +10,7 @@
 ## Serialization utilities for the compiler.
 import strutils
 
-proc c_sprintf(buf, frmt: cstring) {.importc: "sprintf", nodecl, varargs.}
+proc c_sprintf(buf, frmt: cstring) {.importc: "sprintf", header: "<stdio.h>", nodecl, varargs.}
 
 proc toStrMaxPrecision*(f: BiggestFloat): string = 
   if f != f: