diff --git a/Completion/Unix/Command/_gcc b/Completion/Unix/Command/_gcc
index e188c7e9f..28a2ccbda 100644
--- a/Completion/Unix/Command/_gcc
+++ b/Completion/Unix/Command/_gcc
@@ -428,7 +428,7 @@ args+=(
   '-Wdisabled-optimization[Warn when an optimization pass is disabled]'
   '-Wdiv-by-zero[Warn about compile-time integer division by zero]'
   '-Wdouble-promotion[Warn about implicit conversions from "float" to "double"]'
-  '-Weffc++[Warn about violations of Effective C++ style rules]'
+  '-Weffc\+\+[Warn about violations of Effective C++ style rules]'
   '-Wempty-body[Warn about an empty body in an if or else statement]'
   '-Wendif-labels[Warn about stray tokens after #elif and #endif]'
   '-Wenum-compare[Warn about comparison of different enum types]'