1 files changed, 6 insertions, 3 deletions
diff --git a/compat/mingw.c b/compat/mingw.c
index 8b6fa0db44..459ee20df6 100644
--- a/compat/mingw.c
+++ b/compat/mingw.c
@@ -872,7 +872,7 @@ static const char *quote_arg(const char *arg)
 				p++;
 				len++;
 			}
-			if (*p == '"')
+			if (*p == '"' || !*p)
 				n += count*2 + 1;
 			continue;
 		}
@@ -894,16 +894,19 @@ static const char *quote_arg(const char *arg)
 				count++;
 				*d++ = *arg++;
 			}
-			if (*arg == '"') {
+			if (*arg == '"' || !*arg) {
 				while (count-- > 0)
 					*d++ = '\\';
+				/* don't escape the surrounding end quote */
+				if (!*arg)
+					break;
 				*d++ = '\\';
 			}
 		}
 		*d++ = *arg++;
 	}
 	*d++ = '"';
-	*d++ = 0;
+	*d++ = '\0';
 	return q;
 }