diff --git a/build/windows/jhbuild/split-build b/build/windows/jhbuild/split-build
index 2eee4afda6..a221d0f16e 100755
--- a/build/windows/jhbuild/split-build
+++ b/build/windows/jhbuild/split-build
@@ -1,7 +1,7 @@
 #!/bin/sh
 set -e
 
-if [ "x$BUILD_FLAVOUR" == "xdbg" ]; then
+if [ "x$BUILD_FLAVOUR" = "xdbg" ]; then
 	EXT="-dbg"
 else
 	EXT=""