diff --git a/src/gapi_gl.h b/src/gapi_gl.h
index 9c4f2ce..c4e3fc3 100644
--- a/src/gapi_gl.h
+++ b/src/gapi_gl.h
@@ -210,7 +210,9 @@
 
     #if defined(_OS_WIN) || defined(_OS_LINUX)
         PFNGLGENERATEMIPMAPPROC             glGenerateMipmap;
-        PFNGLTEXIMAGE3DPROC                 glTexImage3D;
+        #ifdef _OS_WIN
+            PFNGLTEXIMAGE3DPROC             glTexImage3D;
+        #endif
     // Profiling
         #ifdef PROFILE
             PFNGLOBJECTLABELPROC                glObjectLabel;
@@ -1007,7 +1009,9 @@ namespace GAPI {
 
             #if defined(_OS_WIN) || defined(_OS_LINUX)
                 GetProcOGL(glGenerateMipmap);
-                GetProcOGL(glTexImage3D);
+                #ifdef _OS_WIN
+                    GetProcOGL(glTexImage3D);
+                #endif
 
                 #ifdef PROFILE
                     GetProcOGL(glObjectLabel);