diff --git a/src/link/patch.c b/src/link/patch.c
index 83d24602..4a6e88e8 100644
--- a/src/link/patch.c
+++ b/src/link/patch.c
@@ -68,13 +68,22 @@ getsymbank(SLONG symid)
 		errx(1, "*INTERNAL* UNKNOWN SYMBOL TYPE");
 	}
 
-	if (nBank == BANK_WRAM0 || nBank == BANK_OAM) return 0;
-	if (nBank >= BANK_WRAMX && nBank < (BANK_WRAMX + BANK_COUNT_WRAMX))
+	if (nBank == BANK_WRAM0 || nBank == BANK_ROM0) {
+		/* This can have practical uses. */
+		return 0;
+	} else if (nBank == BANK_OAM) {
+		warnx("Trying to calculate BANK() of label in OAM.");
+		return 0;
+	} else 	if (nBank == BANK_HRAM) {
+		warnx("Trying to calculate BANK() of label in HRAM.");
+		return 0;
+	} else if (nBank >= BANK_WRAMX && nBank < (BANK_WRAMX + BANK_COUNT_WRAMX)) {
 		return nBank - BANK_WRAMX + 1;
-	if (nBank >= BANK_VRAM && nBank < (BANK_VRAM + BANK_COUNT_VRAM))
+	} else if (nBank >= BANK_VRAM && nBank < (BANK_VRAM + BANK_COUNT_VRAM)) {
 		return nBank - BANK_VRAM;
-	if (nBank >= BANK_SRAM && nBank < (BANK_SRAM + BANK_COUNT_SRAM))
+	} else if (nBank >= BANK_SRAM && nBank < (BANK_SRAM + BANK_COUNT_SRAM)) {
 		return nBank - BANK_SRAM;
+	}
 
 	return nBank;
 }