diff --git a/src/compress_lzma.cpp b/src/compress_lzma.cpp
index 54dba11a..79b691e0 100644
--- a/src/compress_lzma.cpp
+++ b/src/compress_lzma.cpp
@@ -95,7 +95,8 @@ int compress_lzma_dummy = 0;
 
 #if (WITH_LZMA >= 0x461)
 #include "C/7zVersion.h"
-#if (WITH_LZMA != (0x100 * MY_VER_MAJOR) + (0x10 * (MY_VER_MINOR / 10)) + (MY_VER_MINOR % 10))
+#if (WITH_LZMA != ((0x1000 * (MY_VER_MAJOR / 10)) + (0x0100 * (MY_VER_MAJOR % 10)) +\
+                   (0x0010 * (MY_VER_MINOR / 10)) + (0x0001 * (MY_VER_MINOR % 10))))
 #  error "WITH_LZMA version mismatch"
 #endif
 
diff --git a/src/stub/src/c/Makevars.lzma b/src/stub/src/c/Makevars.lzma
old mode 100644
new mode 100755
index e55b7834..fe069c8c
--- a/src/stub/src/c/Makevars.lzma
+++ b/src/stub/src/c/Makevars.lzma
@@ -12,7 +12,7 @@ endif
 endif
 
 ifneq ($(wildcard $(UPX_LZMADIR)/C/7zVersion.h),)
-UPX_LZMA_VERSION := $(shell perl -ne 'print "0x$$1$$2" if /^\s*\#\s*define\s+MY_VERSION\s+"(\d)\.(\d\d)[\s\w]*"/;' $(UPX_LZMADIR)/C/7zVersion.h)
+UPX_LZMA_VERSION := $(shell perl -ne 'print "0x$$1$$2" if /^\s*\#\s*define\s+MY_VERSION\s+"(\d*)\.(\d\d)[\s\w]*"/;' $(UPX_LZMADIR)/C/7zVersion.h)
 else ifneq ($(wildcard $(UPX_LZMADIR)/CPP/Windows/Time.cpp),)
 UPX_LZMA_VERSION = 0x459
 else ifneq ($(wildcard $(UPX_LZMADIR)/C/7zBuf.h),)