diff --git a/libopendkim/dkim-atps.c b/libopendkim/dkim-atps.c
index 7154a33f..df6026ca 100644
--- a/libopendkim/dkim-atps.c
+++ b/libopendkim/dkim-atps.c
@@ -39,9 +39,6 @@
 # include <openssl/evp.h>
 #endif /* USE_GNUTLS */
 
-/* prototypes */
-extern void dkim_error (DKIM *, const char *, ...);
-
 /* local definitions needed for DNS queries */
 #define MAXPACKET		8192
 #if defined(__RES) && (__RES >= 19940415)
diff --git a/libopendkim/dkim-canon.c b/libopendkim/dkim-canon.c
index ef95b566..7bd1b02b 100644
--- a/libopendkim/dkim-canon.c
+++ b/libopendkim/dkim-canon.c
@@ -63,9 +63,6 @@
 #define	DKIM_ISWSP(x)	((x) == 011 || (x) == 040)
 #define	DKIM_ISLWSP(x)	((x) == 011 || (x) == 012 || (x) == 015 || (x) == 040)
 
-/* prototypes */
-extern void dkim_error (DKIM *, const char *, ...);
-
 /* ========================= PRIVATE SECTION ========================= */
 
 /*
diff --git a/libopendkim/dkim-internal.h b/libopendkim/dkim-internal.h
index fbe14615..c0fddbf8 100644
--- a/libopendkim/dkim-internal.h
+++ b/libopendkim/dkim-internal.h
@@ -164,5 +164,7 @@ extern DKIM_NAMETABLE *dkim_table_mandatory;
 extern DKIM_STAT dkim_process_set (DKIM *, dkim_set_t, u_char *, size_t,
                                        void *, _Bool, const char *);
 extern DKIM_STAT dkim_siglist_setup (DKIM *);
+extern DKIM_STAT dkim_get_key (DKIM *, DKIM_SIGINFO *, _Bool);
+extern void dkim_error (DKIM *, const char *, ...);
 
 #endif /* ! _DKIM_INTERNAL_H_ */
diff --git a/libopendkim/dkim-keys.c b/libopendkim/dkim-keys.c
index c7d2d167..b0a64eb2 100644
--- a/libopendkim/dkim-keys.c
+++ b/libopendkim/dkim-keys.c
@@ -39,9 +39,6 @@
 # include <strl.h>
 #endif /* USE_STRL_H */
 
-/* prototypes */
-extern void dkim_error (DKIM *, const char *, ...);
-
 /* local definitions needed for DNS queries */
 #define MAXPACKET		8192
 #if defined(__RES) && (__RES >= 19940415)
diff --git a/libopendkim/dkim-report.c b/libopendkim/dkim-report.c
index 38b0bab2..4f50ca4e 100644
--- a/libopendkim/dkim-report.c
+++ b/libopendkim/dkim-report.c
@@ -24,9 +24,6 @@
 #include "dkim-types.h"
 #include "util.h"
 
-/* prototypes */
-extern void dkim_error (DKIM *, const char *, ...);
-
 /* local definitions needed for DNS queries */
 #define MAXPACKET		8192
 #if defined(__RES) && (__RES >= 19940415)
diff --git a/libopendkim/dkim-test.c b/libopendkim/dkim-test.c
index e7684565..f063b757 100644
--- a/libopendkim/dkim-test.c
+++ b/libopendkim/dkim-test.c
@@ -51,9 +51,6 @@
 #define	TESTTTL			300
 #define MAXPACKET		8192
 
-/* prototypes from elsewhere */
-extern DKIM_STAT dkim_get_key (DKIM *, DKIM_SIGINFO *, _Bool);
-
 /*
 **  DKIM_TEST_DNS_PUT -- enqueue a DNS reply for automated testing
 **
diff --git a/libopendkim/dkim-util.c b/libopendkim/dkim-util.c
index 1d4aee70..ae6f6e93 100644
--- a/libopendkim/dkim-util.c
+++ b/libopendkim/dkim-util.c
@@ -28,9 +28,6 @@
 #include "dkim-types.h"
 #include "dkim-util.h"
 
-/* prototypes */
-extern void dkim_error (DKIM *, const char *, ...);
-
 /*
 **  DKIM_MALLOC -- allocate memory
 **