--- uim/anthy.c
+++ uim/anthy.c
@@ -93,16 +93,16 @@
     dlclose(api.diclib);
     return -1;
   }
-  *(int  **)(&api.init) = dlsym(api.lib, "anthy_init");
-  *(int  **)(&api.quit) = dlsym(api.lib, "anthy_quit");
-  *(struct anthy_context **)(&api.create_context) = dlsym(api.lib, "anthy_create_context");
-  *(void **)(&api.release_context) = dlsym(api.lib, "anthy_release_context");
-  *(void **)(&api.set_string) = dlsym(api.lib, "anthy_set_string");
-  *(void **)(&api.get_stat) = dlsym(api.lib, "anthy_get_stat");
-  *(void **)(&api.get_segment_stat) = dlsym(api.lib, "anthy_get_segment_stat");
-  *(int  **)(&api.get_segment) = dlsym(api.lib, "anthy_get_segment");
-  *(void **)(&api.resize_segment) = dlsym(api.lib, "anthy_resize_segment");
-  *(void **)(&api.commit_segment) = dlsym(api.lib, "anthy_commit_segment");
+  api.init = (int (*)(void))dlsym(api.lib, "anthy_init");
+  api.quit = (int (*)(void))dlsym(api.lib, "anthy_quit");
+  api.create_context = (struct anthy_context *(*)(void))dlsym(api.lib, "anthy_create_context");
+  api.release_context = (void (*)(struct anthy_context *))dlsym(api.lib, "anthy_release_context");
+  api.set_string = (void (*)(struct anthy_context *, char *))dlsym(api.lib, "anthy_set_string");
+  api.get_stat = (void (*)(struct anthy_context *, struct anthy_conv_stat *))dlsym(api.lib, "anthy_get_stat");
+  api.get_segment_stat = (void (*)(struct anthy_context *, int, struct anthy_segment_stat *))dlsym(api.lib, "anthy_get_segment_stat");
+  api.get_segment = (int (*)(struct anthy_context *, int, int, char *, int))dlsym(api.lib, "anthy_get_segment");
+  api.resize_segment = (void (*)(struct anthy_context *, int, int))dlsym(api.lib, "anthy_resize_segment");
+  api.commit_segment = (void (*)(struct anthy_context *, int, int))dlsym(api.lib, "anthy_commit_segment");
   if (api.init &&
       api.quit &&
       api.create_context &&
--- xim/connection.cpp
+++ xim/connection.cpp
@@ -216,13 +216,13 @@
 	int format;
 	unsigned long nrItems;
 	unsigned long remain;
-	char *data;
+	unsigned char *data;
 	do {
 	    XGetWindowProperty(XimServer::gDpy, ev->window, ev->data.l[1],
 			       offset, BUF_SIZE - mBuf.len, True,
 			       AnyPropertyType,
 			       &type, &format, &nrItems, &remain,
-			       (unsigned char **)&data);
+			       &data);
 	    if (!data)
 		return false;
 
--- xim/ximserver.cpp
+++ xim/ximserver.cpp
@@ -191,20 +191,20 @@
     Atom type;
     int format;
     unsigned long nr_prop, nr_bytes;
-    Atom *prop;
+    unsigned char *prop;
     int mode = PropModePrepend;
     int valuechange = 1;
 
     XGetWindowProperty(XimServer::gDpy, DefaultRootWindow(XimServer::gDpy),
 		       xim_servers, 0, 8192 ,False,
 		       XA_ATOM, &type, &format,
-		       &nr_prop, &nr_bytes, (unsigned char **)&prop);
+		       &nr_prop, &nr_bytes, &prop);
     int i;
     if (type != XA_ATOM || format != 32)
 	mode = PropModeReplace;
     else {
 	for (i = 0; i < (int)nr_prop; i++) {
-	    if (prop[i] == mServerAtom) {
+	    if (((Atom *)prop)[i] == mServerAtom) {
 		mode = PropModeAppend;
 		valuechange = 0;
 		break;