diff --git a/reactos/lib/glu32/libutil/mipmap.c b/reactos/lib/glu32/libutil/mipmap.c
index 235733c8082..fc68022a5b0 100644
--- a/reactos/lib/glu32/libutil/mipmap.c
+++ b/reactos/lib/glu32/libutil/mipmap.c
@@ -4862,6 +4862,7 @@ static void fill_image(const PixelStorageModes *psm,
 	if (padding) {
 	    rowsize += psm->unpack_alignment - padding;
 	}
+
 	start = (const GLubyte *) userdata + psm->unpack_skip_rows * rowsize +
 		(psm->unpack_skip_pixels * components / 8);
 	elements_per_line = width * components;
@@ -5102,7 +5103,7 @@ static void empty_image(const PixelStorageModes *psm,
     GLint group_size;
     GLint elements_per_line;
     GLubyte *start;
-    GLubyte *iter;
+    GLubyte *iter = NULL;
     const GLushort *iter2;
     GLint i, j, k;
     GLint myswap_bytes;
@@ -5987,7 +5988,7 @@ static void scaleInternalPackedPixel(int components,
     int i,j,k,xindex;
 
     const char *temp, *temp0;
-    int outindex;
+    int outindex = 0;
 
     int lowx_int, highx_int, lowy_int, highy_int;
     float x_percent, y_percent;