diff --git a/contrib/pgcrypto/crypt-blowfish.c b/contrib/pgcrypto/crypt-blowfish.c
index aec7c00cdb9..dc88593bc1e 100644
--- a/contrib/pgcrypto/crypt-blowfish.c
+++ b/contrib/pgcrypto/crypt-blowfish.c
@@ -33,6 +33,7 @@
  */
 
 #include "postgres.h"
+#include "miscadmin.h"
 
 #include "px-crypt.h"
 #include "px.h"
@@ -670,6 +671,8 @@ _crypt_blowfish_rn(const char *key, const char *setting,
 
 	do
 	{
+		CHECK_FOR_INTERRUPTS();
+
 		data.ctx.P[0] ^= data.expanded_key[0];
 		data.ctx.P[1] ^= data.expanded_key[1];
 		data.ctx.P[2] ^= data.expanded_key[2];
diff --git a/contrib/pgcrypto/crypt-des.c b/contrib/pgcrypto/crypt-des.c
index 6834c28cf2f..e2501787a02 100644
--- a/contrib/pgcrypto/crypt-des.c
+++ b/contrib/pgcrypto/crypt-des.c
@@ -61,6 +61,7 @@
  */
 
 #include "postgres.h"
+#include "miscadmin.h"
 
 #include "px.h"
 #include "px-crypt.h"
@@ -541,6 +542,8 @@ do_des(uint32 l_in, uint32 r_in, uint32 *l_out, uint32 *r_out, int count)
 
 	while (count--)
 	{
+		CHECK_FOR_INTERRUPTS();
+
 		/*
 		 * Do each round.
 		 */