diff --git a/src/core/hle/service/service.h b/src/core/hle/service/service.h
index 944a9057e..d91570f29 100644
--- a/src/core/hle/service/service.h
+++ b/src/core/hle/service/service.h
@@ -222,7 +222,7 @@ protected:
      * @param max_sessions Maximum number of sessions that can be
      * connected to this service at the same time.
      */
-    ServiceFramework(const char* service_name, u32 max_sessions = DefaultMaxSessions)
+    explicit ServiceFramework(const char* service_name, u32 max_sessions = DefaultMaxSessions)
         : ServiceFrameworkBase(service_name, max_sessions, Invoker) {}
 
     /// Registers handlers in the service.
diff --git a/src/core/loader/elf.cpp b/src/core/loader/elf.cpp
index c4dd0579a..5c45e5bb4 100644
--- a/src/core/loader/elf.cpp
+++ b/src/core/loader/elf.cpp
@@ -189,7 +189,7 @@ private:
     u32 entryPoint;
 
 public:
-    ElfReader(void* ptr);
+    explicit ElfReader(void* ptr);
 
     u32 Read32(int off) const {
         return base32[off >> 2];
diff --git a/src/core/loader/loader.h b/src/core/loader/loader.h
index 82b2be6a3..11a81b572 100644
--- a/src/core/loader/loader.h
+++ b/src/core/loader/loader.h
@@ -84,7 +84,7 @@ constexpr u32 MakeMagic(char a, char b, char c, char d) {
 /// Interface for loading an application
 class AppLoader : NonCopyable {
 public:
-    AppLoader(FileUtil::IOFile&& file) : file(std::move(file)) {}
+    explicit AppLoader(FileUtil::IOFile&& file) : file(std::move(file)) {}
     virtual ~AppLoader() {}
 
     /**
diff --git a/src/core/tracer/recorder.h b/src/core/tracer/recorder.h
index 629c2f6d2..e1cefd5fe 100644
--- a/src/core/tracer/recorder.h
+++ b/src/core/tracer/recorder.h
@@ -32,7 +32,7 @@ public:
      * Recorder constructor
      * @param initial_state Initial recorder state
      */
-    Recorder(const InitialState& initial_state);
+    explicit Recorder(const InitialState& initial_state);
 
     /// Finish recording of this Citrace and save it using the given filename.
     void Finish(const std::string& filename);