diff --git a/include/minix/callnr.h b/include/minix/callnr.h
index 1f7d7434d..d25acace8 100644
--- a/include/minix/callnr.h
+++ b/include/minix/callnr.h
@@ -64,13 +64,6 @@
 /* Field names for the exit(2) call. */
 #define PM_EXIT_STATUS		m1_i1	/* int */
 
-/* Field names for the execve(2) call. */
-#define PM_EXEC_NAME		m1_p1	/* const char * */
-#define PM_EXEC_NAMELEN		m1_i1	/* size_t */
-#define PM_EXEC_FRAME		m1_p2	/* char * */
-#define PM_EXEC_FRAMELEN	m1_i2	/* size_t */
-#define PM_EXEC_PS_STR		m1_p3	/* char * */
-
 /* Field names for the kill(2), srv_kill(2), and sigaction(2) calls. */
 #define PM_SIG_PID		m1_i1	/* pid_t */
 #define PM_SIG_NR		m1_i2	/* int */
diff --git a/include/minix/ipc.h b/include/minix/ipc.h
index 487d8d0d1..c2d9d6790 100644
--- a/include/minix/ipc.h
+++ b/include/minix/ipc.h
@@ -145,6 +145,17 @@ typedef struct {
 } mess_sigcalls;
 _ASSERT_MSG_SIZE(mess_sigcalls);
 
+typedef struct {
+	vir_bytes name;
+	size_t namelen;
+	vir_bytes frame;
+	size_t framelen;
+	vir_bytes ps_str;
+
+	uint8_t padding[36];
+} mess_lc_pm_exec;
+_ASSERT_MSG_SIZE(mess_lc_pm_exec);
+
 typedef struct {
 	pid_t pid;
 
@@ -1064,6 +1075,7 @@ typedef struct {
 		mess_fs_vfs_readsuper	m_fs_vfs_readsuper;
 		mess_fs_vfs_readwrite	m_fs_vfs_readwrite;
 
+		mess_lc_pm_exec		m_lc_pm_exec;
 		mess_lc_pm_getsid	m_lc_pm_getsid;
 		mess_lc_pm_groups	m_lc_pm_groups;
 		mess_lc_pm_itimer	m_lc_pm_itimer;
diff --git a/lib/libc/sys-minix/execve.c b/lib/libc/sys-minix/execve.c
index 7ace7556d..04420060c 100644
--- a/lib/libc/sys-minix/execve.c
+++ b/lib/libc/sys-minix/execve.c
@@ -44,11 +44,11 @@ int execve(const char *path, char * const *argv, char * const *envp)
 	memset(&m, 0, sizeof(m));
 
 	/* We can finally make the system call. */
-	m.PM_EXEC_NAME = (char *) __UNCONST(path);
-	m.PM_EXEC_NAMELEN = strlen(path) + 1;
-	m.PM_EXEC_FRAME = frame;
-	m.PM_EXEC_FRAMELEN = frame_size;
-	m.PM_EXEC_PS_STR = (char *)(vsp + ((char *)psp - frame));
+	m.m_lc_pm_exec.name = (vir_bytes)path;
+	m.m_lc_pm_exec.namelen = strlen(path) + 1;
+	m.m_lc_pm_exec.frame = (vir_bytes)frame;
+	m.m_lc_pm_exec.framelen = frame_size;
+	m.m_lc_pm_exec.ps_str = (vir_bytes)(vsp + ((char *)psp - frame));
 
 	(void) _syscall(PM_PROC_NR, PM_EXEC, &m);
 
diff --git a/servers/pm/exec.c b/servers/pm/exec.c
index b50d893c4..5e6b3ad35 100644
--- a/servers/pm/exec.c
+++ b/servers/pm/exec.c
@@ -42,11 +42,11 @@ int do_exec()
 	memset(&m, 0, sizeof(m));
 	m.m_type = VFS_PM_EXEC;
 	m.VFS_PM_ENDPT = mp->mp_endpoint;
-	m.VFS_PM_PATH = m_in.PM_EXEC_NAME;
-	m.VFS_PM_PATH_LEN = m_in.PM_EXEC_NAMELEN;
-	m.VFS_PM_FRAME = m_in.PM_EXEC_FRAME;
-	m.VFS_PM_FRAME_LEN = m_in.PM_EXEC_FRAMELEN;
-	m.VFS_PM_PS_STR = (vir_bytes) m_in.PM_EXEC_PS_STR;
+	m.VFS_PM_PATH = (void *)m_in.m_lc_pm_exec.name;
+	m.VFS_PM_PATH_LEN = m_in.m_lc_pm_exec.namelen;
+	m.VFS_PM_FRAME = (void *)m_in.m_lc_pm_exec.frame;
+	m.VFS_PM_FRAME_LEN = m_in.m_lc_pm_exec.framelen;
+	m.VFS_PM_PS_STR = m_in.m_lc_pm_exec.ps_str;
 
 	tell_vfs(mp, &m);