diff --git a/tools/cli/src/main/java/org/teavm/cli/TeaVMRunner.java b/tools/cli/src/main/java/org/teavm/cli/TeaVMRunner.java
index 252073363..18416acf1 100644
--- a/tools/cli/src/main/java/org/teavm/cli/TeaVMRunner.java
+++ b/tools/cli/src/main/java/org/teavm/cli/TeaVMRunner.java
@@ -243,7 +243,7 @@ public final class TeaVMRunner {
         if (commandLine.hasOption('g')) {
             tool.setDebugInformationGenerated(true);
         }
-        if (commandLine.hasOption('S')) {
+        if (commandLine.hasOption('G')) {
             tool.setSourceMapsFileGenerated(true);
         }
     }