diff --git a/src/main/java/net/fabricmc/loom/configuration/ide/idea/IdeaUtils.java b/src/main/java/net/fabricmc/loom/configuration/ide/idea/IdeaUtils.java
index 3c5f8263..e591ef18 100644
--- a/src/main/java/net/fabricmc/loom/configuration/ide/idea/IdeaUtils.java
+++ b/src/main/java/net/fabricmc/loom/configuration/ide/idea/IdeaUtils.java
@@ -55,6 +55,6 @@ public class IdeaUtils {
 			module = project.getName() + "." + module;
 		}
 
-		return module;
+		return module.replace(' ', '_');
 	}
 }