diff --git a/charts/prometheus/templates/deploy.yaml b/charts/prometheus/templates/deploy.yaml
index c018549b6b06..144b4b037d3b 100644
--- a/charts/prometheus/templates/deploy.yaml
+++ b/charts/prometheus/templates/deploy.yaml
@@ -75,10 +75,10 @@ spec:
           {{- end }}
             - --reload-url={{ default $default_url .Values.configmapReload.reloadUrl }}
           {{- range $key, $value := .Values.configmapReload.prometheus.extraArgs }}
-            {{- if ne $value "" }}
-            - --{{ $key }}={{ $value }}
-            {{- else }}
+            {{- if eq ($value | default "") "" }}
             - --{{ $key }}
+            {{- else }}
+            - --{{ $key }}={{ $value }}
             {{- end }}
           {{- end }}
           {{- range .Values.configmapReload.prometheus.extraVolumeDirs }}
@@ -148,10 +148,10 @@ spec:
             - --{{ . }}
           {{- end }}
           {{- range $key, $value := .Values.server.extraArgs }}
-            {{- if ne $value "" }}
-            - --{{ $key }}={{ $value }}
-            {{- else }}
+            {{- if eq ($value | default "") "" }}
             - --{{ $key }}
+            {{- else }}
+            - --{{ $key }}={{ $value }}
             {{- end }}
           {{- end }}
           {{- if .Values.server.prefixURL }}