diff --git a/packages/components/nodes/chains/LLMChain/LLMChain.ts b/packages/components/nodes/chains/LLMChain/LLMChain.ts
index 57c0a907..f7260363 100644
--- a/packages/components/nodes/chains/LLMChain/LLMChain.ts
+++ b/packages/components/nodes/chains/LLMChain/LLMChain.ts
@@ -249,7 +249,7 @@ const runPrediction = async (
 
         for (const variable of inputVariables) {
             seen.push(variable)
-            if (promptValues[variable]) {
+            if (promptValues[variable] != null) {
                 seen.pop()
             }
         }
diff --git a/packages/server/src/utils/index.ts b/packages/server/src/utils/index.ts
index 1a72f72f..34d71c17 100644
--- a/packages/server/src/utils/index.ts
+++ b/packages/server/src/utils/index.ts
@@ -879,7 +879,7 @@ export const getVariableValue = async (
             if (variableFullPath.startsWith('$vars.')) {
                 const vars = await getGlobalVariable(appDataSource, flowData, availableVariables, variableOverrides)
                 const variableValue = get(vars, variableFullPath.replace('$vars.', ''))
-                if (variableValue) {
+                if (variableValue != null) {
                     variableDict[`{{${variableFullPath}}}`] = variableValue
                     returnVal = returnVal.split(`{{${variableFullPath}}}`).join(variableValue)
                 }
@@ -887,7 +887,7 @@ export const getVariableValue = async (
 
             if (variableFullPath.startsWith('$flow.') && flowData) {
                 const variableValue = get(flowData, variableFullPath.replace('$flow.', ''))
-                if (variableValue) {
+                if (variableValue != null) {
                     variableDict[`{{${variableFullPath}}}`] = variableValue
                     returnVal = returnVal.split(`{{${variableFullPath}}}`).join(variableValue)
                 }