diff --git a/src/develop/openmp_maths.h b/src/develop/openmp_maths.h
index a3d466b841f4..8966e4f63b83 100644
--- a/src/develop/openmp_maths.h
+++ b/src/develop/openmp_maths.h
@@ -41,8 +41,10 @@ extern float fabsf(const float x);
 DT_OMP_DECLARE_SIMD()
 extern float powf(const float x, const float y);
 
+#ifndef __GNUC__  // GCC 15 compiles but fails at runtime due to missing library function
 DT_OMP_DECLARE_SIMD()
 extern float sqrtf(const float x);
+#endif
 
 DT_OMP_DECLARE_SIMD()
 extern float cbrtf(const float x);
diff --git a/src/iop/rawdenoise.c b/src/iop/rawdenoise.c
index 841f068dbde6..76802d8a342c 100644
--- a/src/iop/rawdenoise.c
+++ b/src/iop/rawdenoise.c
@@ -226,7 +226,7 @@ static void wavelet_denoise(const float *const restrict in, float *const restric
       const float *const restrict inp = in + (size_t)row * roi->width + offset;
       const int senselwidth = (roi->width-offset+1)/2;
       for(int col = 0; col < senselwidth; col++)
-        fimgp[col] = sqrtf(fmaxf(0.0f, inp[2*col]));
+        fimgp[col] = sqrtf(MAX(0.0f, inp[2*col]));
     }
 
     // perform the wavelet decomposition and denoising
@@ -298,7 +298,7 @@ static void wavelet_denoise(const float *const restrict in, float *const restric
 
 static inline float vstransform(const float value)
 {
-  return sqrtf(fmaxf(0.0f, value));
+  return sqrtf(MAX(0.0f, value));
 }
 
 static void wavelet_denoise_xtrans(const float *const restrict in, float *const restrict out,