diff --git a/GROUPS.md b/GROUPS.md
index d5a0b063..adec4ddd 100644
--- a/GROUPS.md
+++ b/GROUPS.md
@@ -93,7 +93,7 @@ These groups are used mostly for informational purposes
 
 * `solid=1`: Solid full-cube block (automatically assigned)
 * `opaque=1`: Opaque block (automatically assigned)
-* `not_solid=1`: Block is sold (only assign this group for nodes which are automatically detected as “solid” in error
+* `not_solid=1`: Block is not solid (only assign this group for nodes which are automatically detected as “solid” in error
 * `fire=1`: Fire
 * `water=1`: Water
 * `lava=1`: Lava