diff --git a/docker/bootstrap-node.Dockerfile b/docker/bootstrap-node.Dockerfile
index 7518bd6102..3ff6bb7caf 100644
--- a/docker/bootstrap-node.Dockerfile
+++ b/docker/bootstrap-node.Dockerfile
@@ -75,7 +75,7 @@ RUN \
     if [ $BUILDARCH != "riscv64" ] && [ $TARGETARCH = "riscv64" ]; then \
       export RUSTFLAGS="$RUSTFLAGS -C linker=riscv64-linux-gnu-gcc" \
     ; fi && \
-    if [ $TARGETARCH = "amd64" ] && [ "$RUSTFLAGS" = ""]; then \
+    if [ $TARGETARCH = "amd64" ] && [ "$RUSTFLAGS" = "" ]; then \
       case "$TARGETVARIANT" in \
         # x86-64-v2 with AES-NI
         "v2") export RUSTFLAGS="-C target-cpu=x86-64-v2" ;; \
diff --git a/docker/node.Dockerfile b/docker/node.Dockerfile
index b5fbb757c2..1342f9a3bc 100644
--- a/docker/node.Dockerfile
+++ b/docker/node.Dockerfile
@@ -76,7 +76,7 @@ RUN \
     if [ $BUILDARCH != "riscv64" ] && [ $TARGETARCH = "riscv64" ]; then \
       export RUSTFLAGS="$RUSTFLAGS -C linker=riscv64-linux-gnu-gcc" \
     ; fi && \
-    if [ $TARGETARCH = "amd64" ] && [ "$RUSTFLAGS" = ""]; then \
+    if [ $TARGETARCH = "amd64" ] && [ "$RUSTFLAGS" = "" ]; then \
       case "$TARGETVARIANT" in \
         # x86-64-v2 with AES-NI
         "v2") export RUSTFLAGS="-C target-cpu=x86-64-v2" ;; \
diff --git a/docker/runtime.Dockerfile b/docker/runtime.Dockerfile
index da4abfd9dd..cdd02c4d44 100644
--- a/docker/runtime.Dockerfile
+++ b/docker/runtime.Dockerfile
@@ -75,7 +75,7 @@ RUN \
     if [ $BUILDARCH != "riscv64" ] && [ $TARGETARCH = "riscv64" ]; then \
       export RUSTFLAGS="$RUSTFLAGS -C linker=riscv64-linux-gnu-gcc" \
     ; fi && \
-    if [ $TARGETARCH = "amd64" ] && [ "$RUSTFLAGS" = ""]; then \
+    if [ $TARGETARCH = "amd64" ] && [ "$RUSTFLAGS" = "" ]; then \
       case "$TARGETVARIANT" in \
         # x86-64-v2 with AES-NI
         "v2") export RUSTFLAGS="-C target-cpu=x86-64-v2" ;; \