diff --git a/includes/rts/Libdw.h b/includes/rts/Libdw.h
index 391847552edc878dd616d213943e5cc82df57dd1..d7bd55d06edde612559febf999aa3af14519c687 100644
--- a/includes/rts/Libdw.h
+++ b/includes/rts/Libdw.h
@@ -8,6 +8,9 @@
 
 #pragma once
 
+// for FILE
+#include <stdio.h>
+
 // Chunk capacity
 // This is rather arbitrary
 #define BACKTRACE_CHUNK_SZ 256
@@ -89,3 +92,6 @@ Backtrace *libdwGetBacktrace(LibdwSession *session);
 /* Lookup Location information for the given address.
  * Returns 0 if successful, 1 if address could not be found. */
 int libdwLookupLocation(LibdwSession *session, Location *loc, StgPtr pc);
+
+/* Pretty-print a backtrace to the given FILE */
+void libdwPrintBacktrace(LibdwSession *session, FILE *file, Backtrace *bt);
diff --git a/rts/Libdw.h b/rts/Libdw.h
index d737745c02c6b9c67edebca640720a1eb0518d9f..5fd1c9522c44e28c1014d642f3616e60327a06cc 100644
--- a/rts/Libdw.h
+++ b/rts/Libdw.h
@@ -23,9 +23,6 @@ LibdwSession *libdwInit(void);
 /* Free a session */
 void libdwFree(LibdwSession *session);
 
-/* Pretty-print a backtrace to std*/
-void libdwPrintBacktrace(LibdwSession *session, FILE *file, Backtrace *bt);
-
 // Traverse backtrace in order of outer-most to inner-most frame
 #define FOREACH_FRAME_INWARDS(pc, bt)                                 \
     BacktraceChunk *_chunk;                                           \