diff --git a/docs/01.CONFIGURATION.md b/docs/01.CONFIGURATION.md
index ebb20e4ad..b8840ca10 100644
--- a/docs/01.CONFIGURATION.md
+++ b/docs/01.CONFIGURATION.md
@@ -139,7 +139,7 @@ Enabling this feature provides detailed error messages where available, like lin
 | Options |                                              |
 |---------|----------------------------------------------|
 | C:      | `-DJERRY_ERROR_MESSAGES=0/1`                 |
-| CMake:  | `--DJERRY_ERROR_MESSAGES=ON/OFF`             |
+| CMake:  | `-DJERRY_ERROR_MESSAGES=ON/OFF`             |
 | Python: | `--error-messages=ON/OFF`                    |
 
 ### Logging
@@ -196,7 +196,7 @@ The default value is 512.
 | Options |                                              |
 |---------|----------------------------------------------|
 | C:      | `-DJERRY_GLOBAL_HEAP_SIZE=(int)`             |
-| CMake:  | `--DJERRY_GLOBAL_HEAP_SIZE=(int)`            |
+| CMake:  | `-DJERRY_GLOBAL_HEAP_SIZE=(int)`            |
 | Python: | `--mem-heap=(int)`                           |
 
 ### Garbage collection limit