diff --git a/src/ipc/include/wap_client_engine.inc b/src/ipc/include/wap_client_engine.inc
index 202970bb8..93918c1a4 100644
--- a/src/ipc/include/wap_client_engine.inc
+++ b/src/ipc/include/wap_client_engine.inc
@@ -100,7 +100,7 @@ typedef enum {
 } event_t;
 
 //  Names for state machine logging and error reporting
-static char *
+static const char *
 s_state_name [] = {
     "(NONE)",
     "start",
@@ -130,7 +130,7 @@ s_state_name [] = {
     "reexpect open ok"
 };
 
-static char *
+static const char *
 s_event_name [] = {
     "(NONE)",
     "connect",
diff --git a/src/ipc/include/wap_server_engine.inc b/src/ipc/include/wap_server_engine.inc
index b09d54c47..e271a7541 100644
--- a/src/ipc/include/wap_server_engine.inc
+++ b/src/ipc/include/wap_server_engine.inc
@@ -57,7 +57,7 @@ typedef enum {
 } event_t;
 
 //  Names for state machine logging and error reporting
-static char *
+static const char *
 s_state_name [] = {
     "(NONE)",
     "start",
@@ -66,7 +66,7 @@ s_state_name [] = {
     "settling"
 };
 
-static char *
+static const char *
 s_event_name [] = {
     "(NONE)",
     "terminate",