diff --git a/src/libsodium/Makefile.am b/src/libsodium/Makefile.am
index e5bb8138..ece7ba67 100644
--- a/src/libsodium/Makefile.am
+++ b/src/libsodium/Makefile.am
@@ -56,7 +56,6 @@ libsodium_la_SOURCES = \
 	crypto_onetimeauth/poly1305/donna/poly1305_donna32.h \
 	crypto_onetimeauth/poly1305/donna/poly1305_donna64.h \
 	crypto_onetimeauth/poly1305/donna/auth_poly1305_donna.c \
-	crypto_onetimeauth/poly1305/donna/verify_poly1305_donna.c \
 	crypto_pwhash/scryptsalsa208sha256/crypto_scrypt-common.c \
 	crypto_pwhash/scryptsalsa208sha256/crypto_scrypt.h \
 	crypto_pwhash/scryptsalsa208sha256/scrypt_platform.c \
diff --git a/src/libsodium/crypto_onetimeauth/poly1305/donna/auth_poly1305_donna.c b/src/libsodium/crypto_onetimeauth/poly1305/donna/auth_poly1305_donna.c
index cb23c90b..4c70a813 100644
--- a/src/libsodium/crypto_onetimeauth/poly1305/donna/auth_poly1305_donna.c
+++ b/src/libsodium/crypto_onetimeauth/poly1305/donna/auth_poly1305_donna.c
@@ -1,4 +1,5 @@
 
+#include "crypto_verify_16.h"
 #include "utils.h"
 #include "poly1305_donna.h"
 #ifdef HAVE_TI_MODE
@@ -87,6 +88,18 @@ crypto_onetimeauth_poly1305_donna_final(crypto_onetimeauth_poly1305_state *state
     return 0;
 }
 
+static int
+crypto_onetimeauth_poly1305_donna_verify(const unsigned char *h,
+                                         const unsigned char *in,
+                                         unsigned long long inlen,
+                                         const unsigned char *k)
+{
+    unsigned char correct[16];
+
+    crypto_onetimeauth_poly1305_donna(correct,in,inlen,k);
+    return crypto_verify_16(h,correct);
+}
+
 struct crypto_onetimeauth_poly1305_implementation
 crypto_onetimeauth_poly1305_donna_implementation = {
     SODIUM_C99(.onetimeauth =) crypto_onetimeauth_poly1305_donna,
diff --git a/src/libsodium/crypto_onetimeauth/poly1305/donna/verify_poly1305_donna.c b/src/libsodium/crypto_onetimeauth/poly1305/donna/verify_poly1305_donna.c
deleted file mode 100644
index e0598423..00000000
--- a/src/libsodium/crypto_onetimeauth/poly1305/donna/verify_poly1305_donna.c
+++ /dev/null
@@ -1,15 +0,0 @@
-#include "crypto_onetimeauth_poly1305.h"
-#include "crypto_verify_16.h"
-#include "poly1305_donna.h"
-
-int
-crypto_onetimeauth_poly1305_donna_verify(const unsigned char *h,
-                                         const unsigned char *in,
-                                         unsigned long long inlen,
-                                         const unsigned char *k)
-{
-    unsigned char correct[16];
-
-    crypto_onetimeauth_poly1305_donna(correct,in,inlen,k);
-    return crypto_verify_16(h,correct);
-}