diff --git a/src/localisation/localisation.c b/src/localisation/localisation.c
index c8331c81eb..c9868efd46 100644
--- a/src/localisation/localisation.c
+++ b/src/localisation/localisation.c
@@ -958,15 +958,14 @@ int win1252_to_utf8(utf8string dst, const char *src, size_t maxBufferLength)
 		if (srcLength > bufferCount) {
 			bufferCount = srcLength + 4;
 			heapBuffer = malloc(bufferCount * sizeof(utf16));
+			assert(heapBuffer != NULL);
 			intermediateBuffer = heapBuffer;
 		}
 	}
 	MultiByteToWideChar(CP_ACP, 0, src, -1, intermediateBuffer, bufferCount);
 	int result = WideCharToMultiByte(CP_UTF8, 0, intermediateBuffer, -1, dst, maxBufferLength, NULL, NULL);
 
-	if (heapBuffer != NULL) {
-		free(heapBuffer);
-	}
+	free(heapBuffer);
 #else
 	//log_warning("converting %s of size %d", src, srcLength);
 	char *buffer_conv = strndup(src, srcLength);
diff --git a/src/platform/windows.c b/src/platform/windows.c
index b594395bab..2f57d3b2c7 100644
--- a/src/platform/windows.c
+++ b/src/platform/windows.c
@@ -195,10 +195,10 @@ bool platform_directory_delete(const utf8 *path)
 
 	wchar_t *wPath = utf8_to_widechar(path);
 	wcsncpy(pszFrom, wPath, MAX_PATH);
-	free(wPath);
 
 	// Needs to be double-null terminated for some weird reason
 	pszFrom[wcslen(wPath) + 1] = 0;
+	free(wPath);
 
 	SHFILEOPSTRUCTW fileop;
 	fileop.hwnd   = NULL;    // no status display
@@ -370,8 +370,10 @@ int platform_enumerate_directories_begin(const utf8 *directory)
 
 	wchar_t *wDirectory = utf8_to_widechar(directory);
 
-	if (wcslen(wDirectory) + 3 >= MAX_PATH)
+	if (wcslen(wDirectory) + 3 >= MAX_PATH) {
+		free(wDirectory);
 		return INVALID_HANDLE;
+	}
 
 	for (i = 0; i < countof(_enumerateFileInfoList); i++) {
 		enumFileInfo = &_enumerateFileInfoList[i];
@@ -634,7 +636,7 @@ bool platform_open_common_file_dialog(utf8 *outFilename, file_dialog_desc *desc)
 	openFileName.lpstrFilter = wcFilter;
 
 	// Open dialog
-	BOOL result;
+	BOOL result = false;
 	DWORD commonFlags = OFN_EXPLORER | OFN_PATHMUSTEXIST | OFN_HIDEREADONLY | OFN_NOCHANGEDIR;
 	if (desc->type == FD_OPEN) {
 		openFileName.Flags = commonFlags | OFN_NONETWORKBUTTON | OFN_FILEMUSTEXIST;
diff --git a/src/ride/ride.c b/src/ride/ride.c
index 6cad6750a1..f895f4f6d0 100644
--- a/src/ride/ride.c
+++ b/src/ride/ride.c
@@ -1695,9 +1695,12 @@ int ride_modify(rct_xy_element *input)
 	mapElement = *input;
 	rideIndex = mapElement.element->properties.track.ride_index;
 	ride = get_ride(rideIndex);
+	if (ride == NULL) {
+		return 0;
+	}
 	rideType = get_ride_entry_by_ride(ride);
 
-	if ((ride == NULL) || (rideType == NULL) || !ride_check_if_construction_allowed(ride))
+	if ((rideType == NULL) || !ride_check_if_construction_allowed(ride))
 		return 0;
 
 	if (ride->lifecycle_flags & RIDE_LIFECYCLE_INDESTRUCTIBLE) {
diff --git a/src/world/duck.c b/src/world/duck.c
index 852ef6da40..6218339b59 100644
--- a/src/world/duck.c
+++ b/src/world/duck.c
@@ -277,7 +277,7 @@ static void duck_update_fly_away(rct_duck *duck)
 		return;
 	}
 
-	int z = z = min(duck->z + 2, 496);
+	int z = min(duck->z + 2, 496);
 	sprite_move(x, y, z, (rct_sprite*)duck);
 	duck_invalidate(duck);
 }