diff --git a/src/CSFML/Audio/Music.cpp b/src/CSFML/Audio/Music.cpp
index 200b3194..69b6f21c 100644
--- a/src/CSFML/Audio/Music.cpp
+++ b/src/CSFML/Audio/Music.cpp
@@ -33,6 +33,8 @@
 ////////////////////////////////////////////////////////////
 sfMusic* sfMusic_createFromFile(const char* filename)
 {
+    assert(filename);
+
     auto* music = new sfMusic;
     if (!music->This.openFromFile(filename))
     {
diff --git a/src/CSFML/Audio/SoundBuffer.cpp b/src/CSFML/Audio/SoundBuffer.cpp
index 41042a1b..81ce1d78 100644
--- a/src/CSFML/Audio/SoundBuffer.cpp
+++ b/src/CSFML/Audio/SoundBuffer.cpp
@@ -33,6 +33,8 @@
 ////////////////////////////////////////////////////////////
 sfSoundBuffer* sfSoundBuffer_createFromFile(const char* filename)
 {
+    assert(filename);
+
     sf::SoundBuffer soundBuffer;
     if (!soundBuffer.loadFromFile(filename))
         return nullptr;
@@ -106,6 +108,7 @@ void sfSoundBuffer_destroy(const sfSoundBuffer* soundBuffer)
 bool sfSoundBuffer_saveToFile(const sfSoundBuffer* soundBuffer, const char* filename)
 {
     assert(soundBuffer);
+    assert(filename);
     return soundBuffer->This.saveToFile(filename);
 }
 
diff --git a/src/CSFML/Graphics/Font.cpp b/src/CSFML/Graphics/Font.cpp
index a135eadc..8925378d 100644
--- a/src/CSFML/Graphics/Font.cpp
+++ b/src/CSFML/Graphics/Font.cpp
@@ -34,6 +34,8 @@
 ////////////////////////////////////////////////////////////
 sfFont* sfFont_createFromFile(const char* filename)
 {
+    assert(filename);
+
     sf::Font font;
     if (!font.openFromFile(filename))
         return nullptr;
diff --git a/src/CSFML/Graphics/Image.cpp b/src/CSFML/Graphics/Image.cpp
index f36faf6e..d7015ce0 100644
--- a/src/CSFML/Graphics/Image.cpp
+++ b/src/CSFML/Graphics/Image.cpp
@@ -58,6 +58,8 @@ sfImage* sfImage_createFromPixels(sfVector2u size, const uint8_t* data)
 ////////////////////////////////////////////////////////////
 sfImage* sfImage_createFromFile(const char* filename)
 {
+    assert(filename);
+
     sf::Image image;
     if (!image.loadFromFile(filename))
         return nullptr;
@@ -110,6 +112,7 @@ void sfImage_destroy(const sfImage* image)
 bool sfImage_saveToFile(const sfImage* image, const char* filename)
 {
     assert(image);
+    assert(filename);
     return image->This.saveToFile(filename);
 }
 
diff --git a/src/CSFML/Graphics/Texture.cpp b/src/CSFML/Graphics/Texture.cpp
index 7914be87..20026372 100644
--- a/src/CSFML/Graphics/Texture.cpp
+++ b/src/CSFML/Graphics/Texture.cpp
@@ -53,6 +53,8 @@ sfTexture* sfTexture_create(sfVector2u size)
 ////////////////////////////////////////////////////////////
 sfTexture* sfTexture_createFromFile(const char* filename, const sfIntRect* area)
 {
+    assert(filename);
+
     auto* texture = new sfTexture;
 
     const sf::IntRect rect = area ? convertRect(*area) : sf::IntRect();
@@ -69,6 +71,8 @@ sfTexture* sfTexture_createFromFile(const char* filename, const sfIntRect* area)
 ////////////////////////////////////////////////////////////
 sfTexture* sfTexture_createSrgbFromFile(const char* filename, const sfIntRect* area)
 {
+    assert(filename);
+
     auto* texture = new sfTexture;
 
     const sf::IntRect rect = area ? convertRect(*area) : sf::IntRect();