diff --git a/src/TextScr.cpp b/src/TextScr.cpp
index d7d6fe00..676422e9 100644
--- a/src/TextScr.cpp
+++ b/src/TextScr.cpp
@@ -167,6 +167,13 @@ BOOL LoadTextScript_Stage(const char *name)
 	if (head_size == INVALID_FILE_SIZE)
 		return FALSE;
 
+#ifdef FIX_BUGS
+	// The original doesn't check for any kind of buffer overflow here, so feeding in a 1 MiB Head.tsc
+	// (assuming an unchanged TSC_BUFFER_SIZE) would be sure to crash the game, for example.
+	if (head_size > TSC_BUFFER_SIZE)
+		return FALSE;
+#endif
+
 	fp = fopen(path, "rb");
 	if (fp == NULL)
 		return FALSE;
@@ -184,6 +191,12 @@ BOOL LoadTextScript_Stage(const char *name)
 	if (body_size == INVALID_FILE_SIZE)
 		return FALSE;
 
+#ifdef FIX_BUGS
+	// Same as above: the original doesn't bother checking, and may crash on large-enough input
+	if (head_size + body_size > TSC_BUFFER_SIZE)
+		return FALSE;
+#endif
+
 	fp = fopen(path, "rb");
 	if (fp == NULL)
 		return FALSE;