diff --git a/src/hardware/hw_bsp.c b/src/hardware/hw_bsp.c
index 98f10c950..2348d71ae 100644
--- a/src/hardware/hw_bsp.c
+++ b/src/hardware/hw_bsp.c
@@ -193,7 +193,7 @@ static polyvertex_t *fracdivline(fdivline_t *bsp, polyvertex_t *v1,
 	v2dy = bsp->dy;
 
 	den = v2dy*v1dx - v2dx*v1dy;
-	if (fabsf(den) < 1.0E-36f)
+	if (fabsf((float)den) < 1.0E-36f)
 		return NULL;       // parallel
 
 	// first check the frac along the polygon segment,
diff --git a/src/r_data.c b/src/r_data.c
index abac871df..e0b9a8147 100644
--- a/src/r_data.c
+++ b/src/r_data.c
@@ -1220,7 +1220,7 @@ INT32 R_CreateColormap(char *p1, char *p2, char *p3)
 			continue;
 		if (maskcolor == extra_colormaps[i].maskcolor
 			&& fadecolor == extra_colormaps[i].fadecolor
-			&& fabsf(maskamt - extra_colormaps[i].maskamt) < 1.0E-36f
+			&& fabsf((float)(maskamt - extra_colormaps[i].maskamt)) < 1.0E-36f
 			&& fadestart == extra_colormaps[i].fadestart
 			&& fadeend == extra_colormaps[i].fadeend
 			&& fog == extra_colormaps[i].fog)