diff --git a/apps/opencs/model/tools/enchantmentcheck.cpp b/apps/opencs/model/tools/enchantmentcheck.cpp
index e12bfabca4..ef1def6959 100644
--- a/apps/opencs/model/tools/enchantmentcheck.cpp
+++ b/apps/opencs/model/tools/enchantmentcheck.cpp
@@ -87,6 +87,9 @@ void CSMTools::EnchantmentCheckStage::perform(int stage, CSMDoc::Messages& messa
             if (effect->mData.mMagnMax < 0)
                 messages.add(
                     id, "Effect #" + number + " maximum magnitude is negative", "", CSMDoc::Message::Severity_Error);
+            else if (effect->mData.mMagnMax == 0)
+                messages.add(
+                    id, "Effect #" + number + " maximum magnitude is zero", "", CSMDoc::Message::Severity_Warning);
             if (effect->mData.mMagnMin > effect->mData.mMagnMax)
                 messages.add(id, "Effect #" + number + " minimum magnitude is higher than maximum magnitude", "",
                     CSMDoc::Message::Severity_Error);
diff --git a/apps/opencs/model/tools/referenceablecheck.cpp b/apps/opencs/model/tools/referenceablecheck.cpp
index 272521b420..55ed204aef 100644
--- a/apps/opencs/model/tools/referenceablecheck.cpp
+++ b/apps/opencs/model/tools/referenceablecheck.cpp
@@ -363,6 +363,9 @@ void CSMTools::ReferenceableCheckStage::potionCheck(
             if (effect->mData.mMagnMax < 0)
                 messages.add(
                     id, "Effect #" + number + " maximum magnitude is negative", "", CSMDoc::Message::Severity_Error);
+            else if (effect->mData.mMagnMax == 0)
+                messages.add(
+                    id, "Effect #" + number + " maximum magnitude is zero", "", CSMDoc::Message::Severity_Warning);
             if (effect->mData.mMagnMin > effect->mData.mMagnMax)
                 messages.add(id, "Effect #" + number + " minimum magnitude is higher than maximum magnitude", "",
                     CSMDoc::Message::Severity_Error);
diff --git a/apps/opencs/model/tools/spellcheck.cpp b/apps/opencs/model/tools/spellcheck.cpp
index 74ed87a5cc..e4f7322bcf 100644
--- a/apps/opencs/model/tools/spellcheck.cpp
+++ b/apps/opencs/model/tools/spellcheck.cpp
@@ -79,6 +79,9 @@ void CSMTools::SpellCheckStage::perform(int stage, CSMDoc::Messages& messages)
             if (effect->mData.mMagnMax < 0)
                 messages.add(
                     id, "Effect #" + number + " maximum magnitude is negative", "", CSMDoc::Message::Severity_Error);
+            else if (effect->mData.mMagnMax == 0)
+                messages.add(
+                    id, "Effect #" + number + " maximum magnitude is zero", "", CSMDoc::Message::Severity_Warning);
             if (effect->mData.mMagnMin > effect->mData.mMagnMax)
                 messages.add(id, "Effect #" + number + " minimum magnitude is higher than maximum magnitude", "",
                     CSMDoc::Message::Severity_Error);