diff --git a/doc/ReleaseNotes b/doc/ReleaseNotes
index 03d2dcf92a..92a31b7d52 100644
--- a/doc/ReleaseNotes
+++ b/doc/ReleaseNotes
@@ -50,6 +50,7 @@ This issue fixes several bugs that were still found in 1.9.2.
 * GLSL: fix error when legacy matrix generator inputs are mat3
 * Now tries to preserve refresh rate when switching fullscreen on Windows
 * Fix back-to-front sorting when gl-coordinate-system is changed
+* Now also compiles on older Linux distros (eg. CentOS 5 / manylinux1)
 
 ------------------------  RELEASE 1.9.2  ------------------------
 
diff --git a/panda/src/glxdisplay/panda_glxext.h b/panda/src/glxdisplay/panda_glxext.h
index 308e166224..5208302929 100644
--- a/panda/src/glxdisplay/panda_glxext.h
+++ b/panda/src/glxdisplay/panda_glxext.h
@@ -199,6 +199,7 @@ GLXContext glXCreateContextAttribsARB (X11_Display *dpy, GLXFBConfig config, GLX
 
 #ifndef GLX_ARB_get_proc_address
 #define GLX_ARB_get_proc_address 1
+typedef void (*__GLXextFuncPtr)(void);
 typedef __GLXextFuncPtr ( *PFNGLXGETPROCADDRESSARBPROC) (const GLubyte *procName);
 #ifdef GLX_GLXEXT_PROTOTYPES
 __GLXextFuncPtr glXGetProcAddressARB (const GLubyte *procName);
diff --git a/panda/src/vision/webcamVideoV4L.cxx b/panda/src/vision/webcamVideoV4L.cxx
index 71cee3d312..dd77c6813e 100644
--- a/panda/src/vision/webcamVideoV4L.cxx
+++ b/panda/src/vision/webcamVideoV4L.cxx
@@ -23,6 +23,72 @@
 #include <sys/ioctl.h>
 #include <linux/videodev2.h>
 
+#ifndef CPPPARSER
+#ifndef VIDIOC_ENUM_FRAMESIZES
+enum v4l2_frmsizetypes {
+  V4L2_FRMSIZE_TYPE_DISCRETE = 1,
+  V4L2_FRMSIZE_TYPE_CONTINUOUS = 2,
+  V4L2_FRMSIZE_TYPE_STEPWISE = 3,
+};
+
+struct v4l2_frmsize_discrete {
+  __u32 width;
+  __u32 height;
+};
+
+struct v4l2_frmsize_stepwise {
+  __u32 min_width;
+  __u32 max_width;
+  __u32 step_width;
+  __u32 min_height;
+  __u32 max_height;
+  __u32 step_height;
+};
+
+struct v4l2_frmsizeenum {
+  __u32 index;
+  __u32 pixel_format;
+  __u32 type;
+  union {
+    struct v4l2_frmsize_discrete discrete;
+    struct v4l2_frmsize_stepwise stepwise;
+  };
+  __u32 reserved[2];
+};
+
+#define VIDIOC_ENUM_FRAMESIZES _IOWR('V', 74, struct v4l2_frmsizeenum)
+#endif
+
+#ifndef VIDIOC_ENUM_FRAMEINTERVALS
+enum v4l2_frmivaltypes {
+  V4L2_FRMIVAL_TYPE_DISCRETE = 1,
+  V4L2_FRMIVAL_TYPE_CONTINUOUS = 2,
+  V4L2_FRMIVAL_TYPE_STEPWISE = 3,
+};
+
+struct v4l2_frmival_stepwise {
+  struct v4l2_fract min;
+  struct v4l2_fract max;
+  struct v4l2_fract step;
+};
+
+struct v4l2_frmivalenum {
+  __u32 index;
+  __u32 pixel_format;
+  __u32 width;
+  __u32 height;
+  __u32 type;
+  union {
+    struct v4l2_fract               discrete;
+    struct v4l2_frmival_stepwise    stepwise;
+  };
+  __u32 reserved[2];
+};
+
+#define VIDIOC_ENUM_FRAMEINTERVALS _IOWR('V', 75, struct v4l2_frmivalenum)
+#endif
+#endif
+
 TypeHandle WebcamVideoV4L::_type_handle;
 
 ////////////////////////////////////////////////////////////////////