diff --git a/src/c3_fmt.c b/src/c3_fmt.c
index 687d5935c7..6ca5ae4c78 100644
--- a/src/c3_fmt.c
+++ b/src/c3_fmt.c
@@ -25,6 +25,7 @@
 #include "memory.h"
 #include "common.h"
 #include "formats.h"
+#include "loader.h"
 
 #define FORMAT_LABEL			"crypt"
 #define FORMAT_NAME			"generic crypt(3)"
@@ -144,7 +145,7 @@ static int valid(char *ciphertext)
 		return 1;
 	}
 
-	if (id != 10)
+	if (id != 10 && !ldr_in_pot)
 		fprintf(stderr, "Generic crypt(3) module: "
 		    "hash encoding string length %d, type id %c%c\n"
 		    "appears to be unsupported on this system; "
diff --git a/src/loader.c b/src/loader.c
index 93b19d3cf3..6a8b8e2b1d 100644
--- a/src/loader.c
+++ b/src/loader.c
@@ -21,6 +21,7 @@
 
 #ifdef HAVE_CRYPT
 extern struct fmt_main fmt_crypt;
+int ldr_in_pot = 0;
 #endif
 
 /*
@@ -594,8 +595,15 @@ static void ldr_load_pot_line(struct db_main *db, char *line)
 
 void ldr_load_pot_file(struct db_main *db, char *name)
 {
-	if (db->format)
+	if (db->format) {
+#ifdef HAVE_CRYPT
+		ldr_in_pot = 1;
+#endif
 		read_file(db, name, RF_ALLOW_MISSING, ldr_load_pot_line);
+#ifdef HAVE_CRYPT
+		ldr_in_pot = 0;
+#endif
+	}
 }
 
 /*
@@ -849,7 +857,13 @@ static void ldr_show_pot_line(struct db_main *db, char *line)
 
 void ldr_show_pot_file(struct db_main *db, char *name)
 {
+#ifdef HAVE_CRYPT
+	ldr_in_pot = 1;
+#endif
 	read_file(db, name, RF_ALLOW_MISSING, ldr_show_pot_line);
+#ifdef HAVE_CRYPT
+	ldr_in_pot = 0;
+#endif
 }
 
 static void ldr_show_pw_line(struct db_main *db, char *line)
diff --git a/src/loader.h b/src/loader.h
index c17f1c63bc..9007e85fba 100644
--- a/src/loader.h
+++ b/src/loader.h
@@ -194,6 +194,11 @@ struct db_main {
 	struct fmt_main *format;
 };
 
+#ifdef HAVE_CRYPT
+/* Non-zero while the loader is processing the pot file */
+extern int ldr_in_pot;
+#endif
+
 /*
  * Initializes the database before loading.
  */