diff --git a/epan/dissectors/packet-exec.c b/epan/dissectors/packet-exec.c
index 9466293dd2..976d1a93e3 100644
--- a/epan/dissectors/packet-exec.c
+++ b/epan/dissectors/packet-exec.c
@@ -39,14 +39,11 @@
 #include <epan/emem.h>
 #include <epan/packet.h>
 #include <epan/prefs.h>
+#include <wsutil/str_util.h>
 
 /* The exec protocol uses TCP port 512 per its IANA assignment */
 #define EXEC_PORT 512
 
-/* Forward declaration we need below */
-static gboolean exec_isprint_string(guchar *string);
-static gboolean exec_isdigit_string(guchar *string);
-
 /* Variables for our preferences */
 static gboolean preference_info_show_username = TRUE;
 static gboolean preference_info_show_command = FALSE;
@@ -240,7 +237,7 @@ dissect_exec(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
 		 * It is optional, so it may only be 1 character long
 		 * (the NULL)
 		 */
-		if(length == 1 || (exec_isdigit_string(field_stringz)
+		if(length == 1 || (isdigit_string(field_stringz)
 		&& length <= EXEC_STDERR_PORT_LEN)){
 			proto_tree_add_string(exec_tree, hf_exec_stderr_port, tvb, offset, length, (gchar*)field_stringz);
 			 /* Next field we need */
@@ -261,7 +258,7 @@ dissect_exec(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
 
 		/* Check if this looks like the username field */
 		if(length != 1 && length <= EXEC_USERNAME_LEN
-		&& exec_isprint_string(field_stringz)){
+		&& isprint_string(field_stringz)){
 			proto_tree_add_string(exec_tree, hf_exec_username, tvb, offset, length, (gchar*)field_stringz);
 
 			/* Store the username so we can display it in the
@@ -289,7 +286,7 @@ dissect_exec(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
 
 		/* Check if this looks like the password field */
 		if(length != 1 && length <= EXEC_PASSWORD_LEN
-		&& exec_isprint_string(field_stringz)){
+		&& isprint_string(field_stringz)){
 			proto_tree_add_string(exec_tree, hf_exec_password, tvb, offset, length, (gchar*)field_stringz);
 
 			/* Next field we need */
@@ -312,7 +309,7 @@ dissect_exec(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
 
 		/* Check if this looks like the command field */
 		if(length != 1 && length <= EXEC_COMMAND_LEN
-		&& exec_isprint_string(field_stringz)){
+		&& isprint_string(field_stringz)){
 			proto_tree_add_string(exec_tree, hf_exec_command, tvb, offset, length, (gchar*)field_stringz);
 
 			/* Store the username so we can display it in the
@@ -412,39 +409,3 @@ proto_reg_handoff_exec(void)
 	exec_handle = create_dissector_handle(dissect_exec, proto_exec);
 	dissector_add_uint("tcp.port", EXEC_PORT, exec_handle);
 }
-
-/* Custom function to check if an entire string is printable. */
-static gboolean
-exec_isprint_string(guchar *string)
-{
-	guint position;
-
-	/* Loop until we reach the end of the string (a null) */
-	for(position = 0; string[position] != '\0'; position++){
-		if(!isprint(string[position])){
-			/* The string contains a non-printable character */
-			return FALSE;
-		}
-	}
-
-	/* The string contains only printable characters */
-	return TRUE;
-}
-
-/* Custom function to check if an entire string is digits. */
-static gboolean
-exec_isdigit_string(guchar *string)
-{
-	guint position;
-
-	/* Loop until we reach the end of the string (a null) */
-	for(position = 0; string[position] != '\0'; position++){
-		if(!isdigit(string[position])){
-			/* The string contains a non-digit character */
-			return FALSE;
-		}
-	}
-
-	/* The string contains only digits */
-	return TRUE;
-}
diff --git a/wsutil/libwsutil.def b/wsutil/libwsutil.def
index 4d811c098c..c76e646d22 100644
--- a/wsutil/libwsutil.def
+++ b/wsutil/libwsutil.def
@@ -88,6 +88,8 @@ strptime
 ; str_util.c
 ascii_strdown_inplace
 ascii_strup_inplace
+isprint_string
+isdigit_string
 
 ; type_util.c
 type_util_gdouble_to_guint64
diff --git a/wsutil/str_util.c b/wsutil/str_util.c
index e94fec9046..717fcb516d 100644
--- a/wsutil/str_util.c
+++ b/wsutil/str_util.c
@@ -29,6 +29,8 @@
 #include <glib.h>
 #include "str_util.h"
 
+#include <ctype.h>
+
 /* Convert all ASCII letters to lower case, in place. */
 gchar *
 ascii_strdown_inplace(gchar *str)
@@ -52,3 +54,39 @@ ascii_strup_inplace(gchar *str)
 
         return (str);
 }
+
+/* Check if an entire string is printable. */
+gboolean
+isprint_string(guchar *str)
+{
+	guint pos;
+
+	/* Loop until we reach the end of the string (a null) */
+	for(pos = 0; str[pos] != '\0'; pos++){
+		if(!isprint(str[pos])){
+			/* The string contains a non-printable character */
+			return FALSE;
+		}
+	}
+
+	/* The string contains only printable characters */
+	return TRUE;
+}
+
+/* Check if an entire string is digits. */
+gboolean
+isdigit_string(guchar *str)
+{
+	guint pos;
+
+	/* Loop until we reach the end of the string (a null) */
+	for(pos = 0; str[pos] != '\0'; pos++){
+		if(!isdigit(str[pos])){
+			/* The string contains a non-digit character */
+			return FALSE;
+		}
+	}
+
+	/* The string contains only digits */
+	return TRUE;
+}
diff --git a/wsutil/str_util.h b/wsutil/str_util.h
index cbc6f2bad5..63537183fd 100644
--- a/wsutil/str_util.h
+++ b/wsutil/str_util.h
@@ -59,4 +59,18 @@ gchar *ascii_strdown_inplace(gchar *str);
  */
 gchar *ascii_strup_inplace(gchar *str);
 
+/** Check if an entire string consists of printable characters
+ *  
+ * @param str The string to be checked
+ * @return    TRUE if the entire string is printable, otherwise FALSE
+ */
+gboolean isprint_string(guchar *string);
+
+/** Check if an entire string consists of digits
+ *  
+ * @param str The string to be checked
+ * @return    TRUE if the entire string is digits, otherwise FALSE
+ */
+gboolean isdigit_string(guchar *string);
+
 #endif /* __STR_UTIL_H__ */