diff --git a/CMakeLists.txt b/CMakeLists.txt
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -35,8 +35,6 @@
     KDELibs4Support
 )
 
-find_package(OpenMP)
-
 add_definitions(-DQT_USE_QSTRINGBUILDER)
 
 find_package(KF5Sane)
@@ -341,7 +339,6 @@
     Qt5::PrintSupport
     ${KSANE_LIBRARIES}
     kolourpaint_lgpl
-    OpenMP::OpenMP_CXX
 )
 
 if(KSANE_FOUND)
diff --git a/imagelib/effects/blitz.cpp b/imagelib/effects/blitz.cpp
--- a/imagelib/effects/blitz.cpp
+++ b/imagelib/effects/blitz.cpp
@@ -66,7 +66,6 @@
 
 #include <QColor>
 #include <cmath>
-#include <omp.h>
 
 #define M_SQ2PI 2.50662827463100024161235523934010416269302368164062
 #define M_EPSILON 1.0e-6
@@ -294,7 +293,6 @@
             QRgb pixel;
             for (auto i = 0; i < mh; i++) {
                 p2 = (QRgb *)img.scanLine(i + my);
-#pragma omp for
                 for (auto j = 0; j < width; ++j) {
                     p2++;
                     pixel = convertFromPremult(*p2);
@@ -312,7 +310,6 @@
             unsigned char *ptr;
             for (auto i = 0; i < mh; ++i) {
                 ptr = img.scanLine(i + my);
-#pragma omp for
                 for (auto j = 0; j < width; ++j) {
                     ptr++;
                     pixel = colorTable[*ptr];
@@ -328,7 +325,6 @@
         default: {
             for (auto i = 0; i < mh; ++i) {
                 p2 = (QRgb *)img.scanLine(i + my);
-#pragma omp for
                 for (auto j = 0; j < width; j++) {
                     p2++;
                     as[j] += qAlpha(*p2);
@@ -341,7 +337,6 @@
         }
         }
 
-#pragma omp for
         for (auto i = 0; i < width; ++i) {
             auto a{0};
             auto r{0};