diff --git a/ref/gl/gl_studio.c b/ref/gl/gl_studio.c
index f2080678..f78ee774 100644
--- a/ref/gl/gl_studio.c
+++ b/ref/gl/gl_studio.c
@@ -35,7 +35,7 @@ typedef struct
 // never gonna change, just shut up const warning
 cvar_t r_shadows = { (char *)"r_shadows", (char *)"0", 0 };
 
-static vec3_t hullcolor[8] =
+static const vec3_t hullcolor[8] =
 {
 { 1.0f, 1.0f, 1.0f },
 { 1.0f, 0.5f, 0.5f },
diff --git a/ref/soft/r_studio.c b/ref/soft/r_studio.c
index c18955bc..74bbfe5e 100644
--- a/ref/soft/r_studio.c
+++ b/ref/soft/r_studio.c
@@ -34,7 +34,7 @@ typedef struct
 
 cvar_t r_shadows = { (char *)"r_shadows", (char *)"0", 0 };
 
-static vec3_t hullcolor[8] =
+static const vec3_t hullcolor[8] =
 {
 { 1.0f, 1.0f, 1.0f },
 { 1.0f, 0.5f, 0.5f },