diff --git a/src/Add-ons/AddonVersion.cxx b/src/Add-ons/AddonVersion.cxx
index 49097f549..26c93f7f0 100644
--- a/src/Add-ons/AddonVersion.cxx
+++ b/src/Add-ons/AddonVersion.cxx
@@ -95,7 +95,7 @@ AddonVersionSuffix::releaseTypeStr(AddonVersionSuffixPrereleaseType releaseType)
     return string();
   default:
     throw sg_error("unexpected value for member of "
-                   "flightgear::AddonVersionSuffixPrereleaseType: " +
+                   "flightgear::addons::AddonVersionSuffixPrereleaseType: " +
                    std::to_string(enumValue(releaseType)));
   }
 }
diff --git a/src/Add-ons/AddonVersion.hxx b/src/Add-ons/AddonVersion.hxx
index 65dc9e307..da3c3888b 100644
--- a/src/Add-ons/AddonVersion.hxx
+++ b/src/Add-ons/AddonVersion.hxx
@@ -146,7 +146,7 @@ public:
   explicit AddonVersion(const std::tuple<int, int, int, AddonVersionSuffix>& t);
 
   // Using the method names major() and minor() can lead to incomprehensible
-  // errors such as "major is not a member of flightgear::AddonVersion"
+  // errors such as "major is not a member of flightgear::addons::AddonVersion"
   // because of a hideous glibc bug[1]: major() and minor() are defined by
   // standard headers as *macros*!
   //