diff --git a/src/bbcbasic.js b/src/bbcbasic.js
index 51ee457..823d738 100644
--- a/src/bbcbasic.js
+++ b/src/bbcbasic.js
@@ -180,7 +180,7 @@ export function registerBbcBasicLanguage() {
             remStatement: [[/.*/, "comment", "@pop"]],
             asm: [
                 [
-                    /ADC|AND|ASL|B(CC|CS|EQ|MI|NE|PL|VC|VS)|BIT|BR[AK]|CL[CDIV]|CMP|CP[XY]|DE[CXY]|EOR|IN[CXY]|JMP|JSR|LD[AXY]|LSR|NOP|ORA|PH[AP]|PL[AP]|RO[LR]|RTI|RTS|SBC|SE[CDI]|ST[AXY]|TA[XY]|TSX|TX[AS]|TYA/,
+                    /ADC|AND|ASL|B(CC|CS|EQ|MI|NE|PL|VC|VS)|BIT|BRK|CL[CDIV]|CMP|CP[XY]|DE[CXY]|EOR|IN[CXY]|JMP|JSR|LD[AXY]|LSR|NOP|ORA|PH[AP]|PL[AP]|RO[LR]|RTI|RTS|SBC|SE[CDI]|ST[AXY]|TA[XY]|TSX|TX[AS]|TYA/,
                     "keyword",
                 ],
                 [/OPT|EQU[BDSW]/, "keyword.directive"],