diff --git a/src/unshield.c b/src/unshield.c
index 857c5105..9e0f8099 100644
--- a/src/unshield.c
+++ b/src/unshield.c
@@ -364,7 +364,7 @@ static bool handle_parameters(
 
 static bool extract_file(Unshield* unshield, const char* prefix, int index)
 {
-  bool success;
+  bool success = false;
   char* dirname;
   char* filename;
   char* p;
@@ -595,7 +595,7 @@ static int extract_helper(Unshield* unshield, const char* prefix, int first, int
 
 static bool test_file(Unshield* unshield, int index)
 {
-  bool success;
+  bool success = false;
 
   printf("  testing: %s\n", unshield_file_name(unshield, index));