3 files changed, 9 insertions, 6 deletions
diff --git a/text.c b/text.c
index 0d337c3..291cc3a 100644
--- a/text.c
+++ b/text.c
@@ -1312,10 +1312,11 @@ bool text_modified(Text *txt) {
 	return txt->saved_revision != txt->history;
 }
 
-bool text_sigbus(Text *txt, const char *addr) {
+bool text_mmaped(Text *txt, const char *ptr) {
+	uintptr_t addr = (uintptr_t)ptr;
 	for (Block *blk = txt->blocks; blk; blk = blk->next) {
 		if ((blk->type == MMAP_ORIG || blk->type == MMAP) &&
-		    blk->data <= addr && addr < blk->data + blk->size)
+		    (uintptr_t)(blk->data) <= addr && addr < (uintptr_t)(blk->data + blk->size))
 			return true;
 	}
 	return false;
diff --git a/text.h b/text.h
index 4d4f9bc..d53d1ed 100644
--- a/text.h
+++ b/text.h
@@ -254,9 +254,11 @@ Mark text_mark_set(Text*, size_t pos);
 size_t text_mark_get(Text*, Mark);
 /** @} */
 
-/* query whether `addr` is part of a memory mapped region associated with
- * this text instance */
-bool text_sigbus(Text*, const char *addr);
+/**
+ * Check whether ``ptr`` is part of a memory mapped region associated with
+ * this text instance.
+ */
+bool text_mmaped(Text*, const char *ptr);
 
 /**
  * @defgroup save
diff --git a/vis.c b/vis.c
index bc488f6..be12efb 100644
--- a/vis.c
+++ b/vis.c
@@ -1274,7 +1274,7 @@ bool vis_signal_handler(Vis *vis, int signum, const siginfo_t *siginfo, const vo
 	switch (signum) {
 	case SIGBUS:
 		for (File *file = vis->files; file; file = file->next) {
-			if (text_sigbus(file->text, siginfo->si_addr))
+			if (text_mmaped(file->text, siginfo->si_addr))
 				file->truncated = true;
 		}
 		vis->sigbus = true;