diff --git a/lib/ivis_opengl/pieblitfunc.c b/lib/ivis_opengl/pieblitfunc.c
index ba7ba6c69..eab2ce713 100644
--- a/lib/ivis_opengl/pieblitfunc.c
+++ b/lib/ivis_opengl/pieblitfunc.c
@@ -285,13 +285,16 @@ BOOL pie_ShutdownRadar(void)
 void pie_DownLoadRadar(UDWORD *buffer, int width, int height)
 {
 	int w = 1, h = 1;
+	char *black;
 
 	/* Find power of two size */
 	while (width > (w *= 2));
 	while (height > (h *= 2));
 
 	pie_SetTexturePage(radarTexture);
-	glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, w, h, 0, GL_RGBA, GL_UNSIGNED_BYTE, NULL);
+	black = calloc(1, w * h * 4);
+	glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, w, h, 0, GL_RGBA, GL_UNSIGNED_BYTE, black);
+	free(black);
 	glTexSubImage2D(GL_TEXTURE_2D, 0, 0, 0, width, height, GL_RGBA, GL_UNSIGNED_BYTE, buffer);
 	glTexEnvf(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE);
 	glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
diff --git a/lib/sequence/sequence.c b/lib/sequence/sequence.c
index 928213832..98b3242ff 100644
--- a/lib/sequence/sequence.c
+++ b/lib/sequence/sequence.c
@@ -667,6 +667,7 @@ bool seq_Play(const char* filename)
 	/* open video */
 	if (theora_p)
 	{
+		char *blackframe = calloc(1, texture_width * texture_height * 4);
 		if (videodata.ti.frame_width > texture_width ||
 				videodata.ti.frame_height > texture_height)
 		{
@@ -684,7 +685,8 @@ bool seq_Play(const char* filename)
 		glGenTextures(1, &video_texture);
 		glBindTexture(GL_TEXTURE_2D, video_texture);
 		glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, texture_width, texture_height,
-				0, GL_RGBA, GL_UNSIGNED_BYTE, NULL);
+				0, GL_RGBA, GL_UNSIGNED_BYTE, blackframe);
+		free(blackframe);
 		glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
 		glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
 		glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP);