diff --git a/proc/alloc.h b/proc/alloc.h
index 19c91d78..eedbb2ba 100644
--- a/proc/alloc.h
+++ b/proc/alloc.h
@@ -5,6 +5,8 @@
 
 EXTERN_C_BEGIN
 
+typedef void (*message_fn)(const char *__restrict, ...) __attribute__((format(printf,1,2)));
+
  /* change xalloc_err_handler to override the default fprintf(stderr... */
 extern message_fn xalloc_err_handler;
 
diff --git a/proc/procps.h b/proc/procps.h
index 375d6c69..ec746280 100644
--- a/proc/procps.h
+++ b/proc/procps.h
@@ -87,7 +87,4 @@
 #define HIDDEN_ALIAS(x) extern __typeof(x) x##_direct __attribute__((alias(#x)))
 #endif
 
-
-typedef void (*message_fn)(const char *__restrict, ...) __attribute__((format(printf,1,2)));
-
 #endif