diff --git a/src/egl_context.h b/src/egl_context.h
index e7a3383b..8bfb7db6 100644
--- a/src/egl_context.h
+++ b/src/egl_context.h
@@ -47,26 +47,26 @@ typedef struct wl_egl_window* EGLNativeWindowType;
  #error "No supported EGL platform selected"
 #endif
 
-#define EGL_SUCCESS	0x3000
-#define EGL_NOT_INITIALIZED	0x3001
+#define EGL_SUCCESS 0x3000
+#define EGL_NOT_INITIALIZED 0x3001
 #define EGL_BAD_ACCESS 0x3002
 #define EGL_BAD_ALLOC 0x3003
 #define EGL_BAD_ATTRIBUTE 0x3004
 #define EGL_BAD_CONFIG 0x3005
-#define EGL_BAD_CONTEXT	0x3006
-#define EGL_BAD_CURRENT_SURFACE	0x3007
-#define EGL_BAD_DISPLAY	0x3008
+#define EGL_BAD_CONTEXT 0x3006
+#define EGL_BAD_CURRENT_SURFACE 0x3007
+#define EGL_BAD_DISPLAY 0x3008
 #define EGL_BAD_MATCH 0x3009
 #define EGL_BAD_NATIVE_PIXMAP 0x300a
 #define EGL_BAD_NATIVE_WINDOW 0x300b
 #define EGL_BAD_PARAMETER 0x300c
-#define EGL_BAD_SURFACE	0x300d
+#define EGL_BAD_SURFACE 0x300d
 #define EGL_CONTEXT_LOST 0x300e
 #define EGL_COLOR_BUFFER_TYPE 0x303f
 #define EGL_RGB_BUFFER 0x308e
 #define EGL_SURFACE_TYPE 0x3033
 #define EGL_WINDOW_BIT 0x0004
-#define EGL_RENDERABLE_TYPE	0x3040
+#define EGL_RENDERABLE_TYPE 0x3040
 #define EGL_OPENGL_ES_BIT 0x0001
 #define EGL_OPENGL_ES2_BIT 0x0004
 #define EGL_OPENGL_BIT 0x0008
@@ -76,7 +76,7 @@ typedef struct wl_egl_window* EGLNativeWindowType;
 #define EGL_RED_SIZE 0x3024
 #define EGL_DEPTH_SIZE 0x3025
 #define EGL_STENCIL_SIZE 0x3026
-#define EGL_SAMPLES	0x3031
+#define EGL_SAMPLES 0x3031
 #define EGL_OPENGL_ES_API 0x30a0
 #define EGL_OPENGL_API 0x30a2
 #define EGL_NONE 0x3038
diff --git a/src/glx_context.h b/src/glx_context.h
index cff5ddc5..94f07e2e 100644
--- a/src/glx_context.h
+++ b/src/glx_context.h
@@ -29,11 +29,11 @@
 #define GLX_RGBA_BIT 0x00000001
 #define GLX_WINDOW_BIT 0x00000001
 #define GLX_DRAWABLE_TYPE 0x8010
-#define GLX_RENDER_TYPE	0x8011
+#define GLX_RENDER_TYPE 0x8011
 #define GLX_RGBA_TYPE 0x8014
 #define GLX_DOUBLEBUFFER 5
 #define GLX_STEREO 6
-#define GLX_AUX_BUFFERS	7
+#define GLX_AUX_BUFFERS 7
 #define GLX_RED_SIZE 8
 #define GLX_GREEN_SIZE 9
 #define GLX_BLUE_SIZE 10
@@ -42,7 +42,7 @@
 #define GLX_STENCIL_SIZE 13
 #define GLX_ACCUM_RED_SIZE 14
 #define GLX_ACCUM_GREEN_SIZE 15
-#define GLX_ACCUM_BLUE_SIZE	16
+#define GLX_ACCUM_BLUE_SIZE 16
 #define GLX_ACCUM_ALPHA_SIZE 17
 #define GLX_SAMPLES 0x186a1
 #define GLX_VISUAL_ID 0x800b
diff --git a/src/internal.h b/src/internal.h
index 8eda20e5..acdae22d 100644
--- a/src/internal.h
+++ b/src/internal.h
@@ -84,8 +84,8 @@ typedef GLFWglproc (* _GLFWgetprocaddressfun)(const char*);
 typedef void (* _GLFWdestroycontextfun)(_GLFWwindow*);
 
 #define GL_VERSION 0x1f02
-#define GL_NONE	0
-#define GL_COLOR_BUFFER_BIT	0x00004000
+#define GL_NONE 0
+#define GL_COLOR_BUFFER_BIT 0x00004000
 #define GL_UNSIGNED_BYTE 0x1401
 #define GL_EXTENSIONS 0x1f03
 #define GL_NUM_EXTENSIONS 0x821d
@@ -102,7 +102,7 @@ typedef void (* _GLFWdestroycontextfun)(_GLFWwindow*);
 #define GL_CONTEXT_RELEASE_BEHAVIOR_FLUSH 0x82fc
 #define GL_CONTEXT_FLAG_NO_ERROR_BIT_KHR 0x00000008
 
-typedef int	GLint;
+typedef int GLint;
 typedef unsigned int GLuint;
 typedef unsigned int GLenum;
 typedef unsigned int GLbitfield;
diff --git a/src/win32_platform.h b/src/win32_platform.h
index 943c445b..6507c872 100644
--- a/src/win32_platform.h
+++ b/src/win32_platform.h
@@ -212,7 +212,7 @@ typedef enum
 
 // HACK: Define macros that some dinput.h variants don't
 #ifndef DIDFT_OPTIONAL
- #define DIDFT_OPTIONAL	0x80000000
+ #define DIDFT_OPTIONAL 0x80000000
 #endif
 
 // winmm.dll function pointer typedefs