diff --git a/queries/c/highlights.scm b/queries/c/highlights.scm
index c0df45d48..d6e3a7a15 100644
--- a/queries/c/highlights.scm
+++ b/queries/c/highlights.scm
@@ -31,7 +31,6 @@
 
 "--" @operator
 "-" @operator
-"-=" @operator
 "->" @operator
 "!=" @operator
 "*" @operator
@@ -40,7 +39,6 @@
 "&&" @operator
 "+" @operator
 "++" @operator
-"+=" @operator
 "<" @operator
 "<=" @operator
 "==" @operator
@@ -51,6 +49,13 @@
 "!" @operator
 "||" @operator
 
+"-=" @operator
+"+=" @operator
+"*=" @operator
+"/=" @operator
+"|=" @operator
+"&=" @operator
+
 "." @punctuation.delimiter
 ";" @punctuation.delimiter
 ":" @punctuation.delimiter