diff --git a/src/r_things.c b/src/r_things.c
index 2f19af833..108589493 100644
--- a/src/r_things.c
+++ b/src/r_things.c
@@ -331,7 +331,7 @@ static boolean R_AddSingleSpriteDef(const char *sprname, spritedef_t *spritedef,
 			case SRF_2D: // both Left and Right rotations
 			// we test to see whether the left and right slots are present
 			if ((sprtemp[frame].lumppat[2] == LUMPERROR) || (sprtemp[frame].lumppat[6] == LUMPERROR))
-				I_Error("R_AddSingleSpriteDef: Sprite %s frame %c is missing rotations",
+				I_Error("R_AddSingleSpriteDef: Sprite %.4s frame %c is missing rotations",
 				sprname, R_Frame2Char(frame));
 			break;