diff --git a/lib/roken/roken.h b/lib/roken/roken.h
index 30c7c83d0..22b81de7a 100644
--- a/lib/roken/roken.h
+++ b/lib/roken/roken.h
@@ -3,6 +3,8 @@
 #ifndef __ROKEN_H__
 #define __ROKEN_H__
 
+#include <stdlib.h>
+#include <string.h>
 #include <sys/types.h>
 #include <netinet/in.h>
 
@@ -35,10 +37,6 @@ typedef RETSIGTYPE (*SigAction)(/* int??? */);
 SigAction signal(int iSig, SigAction pAction); /* BSD compatible */
 #endif
 
-#ifndef HAVE_SNPRINTF
-int snprintf(char *s, int n, const char *fmt, ...);
-#endif
-
 #ifndef HAVE_STRERROR
 char *strerror(int eno);
 #endif
diff --git a/lib/roken/roken.h.in b/lib/roken/roken.h.in
index 30c7c83d0..22b81de7a 100644
--- a/lib/roken/roken.h.in
+++ b/lib/roken/roken.h.in
@@ -3,6 +3,8 @@
 #ifndef __ROKEN_H__
 #define __ROKEN_H__
 
+#include <stdlib.h>
+#include <string.h>
 #include <sys/types.h>
 #include <netinet/in.h>
 
@@ -35,10 +37,6 @@ typedef RETSIGTYPE (*SigAction)(/* int??? */);
 SigAction signal(int iSig, SigAction pAction); /* BSD compatible */
 #endif
 
-#ifndef HAVE_SNPRINTF
-int snprintf(char *s, int n, const char *fmt, ...);
-#endif
-
 #ifndef HAVE_STRERROR
 char *strerror(int eno);
 #endif