diff --git a/MissionEditor/Loading.cpp b/MissionEditor/Loading.cpp
index b33de42..663de6a 100644
--- a/MissionEditor/Loading.cpp
+++ b/MissionEditor/Loading.cpp
@@ -534,6 +534,9 @@ bool CLoading::LoadSingleFrameShape(const CString& name, int nFrame, int deltaX,
 	if (!FSunPackLib::XCC_GetSHPHeader(&header)) {
 		return false;
 	}
+	if (nFrame >= header.c_images) {
+		nFrame = 0;
+	}
 	if (!FSunPackLib::LoadSHPImage(nFrame, 1, &pBuffer)) {
 		return false;
 	}
diff --git a/MissionEditorPackLib/MissionEditorPackLib.cpp b/MissionEditorPackLib/MissionEditorPackLib.cpp
index 1723b0c..d1f06b2 100644
--- a/MissionEditorPackLib/MissionEditorPackLib.cpp
+++ b/MissionEditorPackLib/MissionEditorPackLib.cpp
@@ -922,6 +922,9 @@ namespace FSunPackLib
 		if (head.cx == 0 || head.cy == 0) {
 			return FALSE;
 		}
+		if (startIndex >= head.c_images) {
+			return FALSE;
+		}
 
 		std::vector<byte> decode_image_buffer;
 		for (auto frameIdx = 0; frameIdx < wantedNum; frameIdx++) {